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Cheap flights from St. Louis (STL) to Dulles Intl (IAD) from $94

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/2. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
STL — IAD
Jun 4 — Jun 111
From?
To?
Tue 6/4
Tue 6/11
1 adult, Economy
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The best prices from Lambert-St Louis to Washington, D.C. Dulles Intl are usually found in December or March, booked 52 days in advance, depart on a Saturday or Tuesday and return on a Wednesday

Cheap flight deals from St. Louis to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from St. Louis (STL) to Dulles Intl (IAD). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated May 30, 2024.

Popular in

April

Cheapest in

December

Round-trip from

$236

One-way from

$184
High demand for flights, 18% potential price rise
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Best time to find cheap flights, 14% potential price drop
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From Lambert-St Louis to Washington, D.C. Dulles Intl
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One-way flight from Lambert-St Louis to Washington, D.C. Dulles Intl
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What is the cheapest day to fly round-trip from St. Louis to Washington, D.C. Dulles Intl Airport?

Flights from St. Louis to Washington, D.C. Dulles Intl Airport are found to be more expensive on Saturday. This shouldn't discourage you from searching as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Washington, D.C. Dulles Intl Airport.

How far in advance should I book a flight from St. Louis to Washington, D.C. Dulles Intl Airport?

To save on the cost of your flight from St. Louis to Washington, D.C. Dulles Intl Airport, book at least 53 days before your planned departure. Booking around this time can save you about 108% on the cost of this flight compared to booking a flight leaving this week. We have found prices from $327 if you need a flight within two weeks. For flights within the next 72 hours, you can find tickets from as low as $466.

What is the cheapest month to fly from St. Louis to Washington, D.C. Dulles Intl Airport?

Due to multiple factors, expect to potentially pay more when booking in June. For low rates, January can be a great choice for travel to Washington, D.C. Dulles Intl Airport. Flights to Washington, D.C. Dulles Intl Airport from St. Louis in January are about $275 on average during January, but can be found for as low as $108.

What is the cheapest time of day to fly from STL to IAD?

It’s optimal to fly from St. Louis to Washington, D.C. Dulles Intl Airport in the evening. By choosing this option you can save up to 43% on the cost of your flight, compared to a flight at noon.

Cheap American Airlines flights from St. Louis to Dulles Intl

Explore cheap flight options specifically provided by American Airlines for the route between St. Louis and Dulles Intl. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.
Check out some of the cheapest American Airlines flights we've come across from St. Louis to Washington, D.C.. It's recommended that users confirm their flight details before booking.
Wed 7/106:04 amSTL - IAD
2 stops10h 04mAmerican Airlines
Tue 7/168:10 pmIAD - STL
1 stop4h 19mAmerican Airlines
Deal found 5/29$314
Sat 8/35:46 pmSTL - IAD
1 stop5h 15mAmerican Airlines
Mon 8/125:03 amIAD - STL
1 stop4h 08mAmerican Airlines
Deal found 5/30$319
Sat 6/155:15 amSTL - IAD
1 stop6h 28mAmerican Airlines
Sun 6/235:00 amIAD - STL
1 stop4h 33mAmerican Airlines
Deal found 5/29$328
Tue 6/117:00 amSTL - IAD
1 stop4h 43mAmerican Airlines
Wed 6/125:00 amIAD - STL
1 stop4h 33mAmerican Airlines
Deal found 5/29$353
Tue 7/96:04 amSTL - IAD
2 stops9h 58mAmerican Airlines
Tue 7/165:00 amIAD - STL
1 stop4h 30mAmerican Airlines
Deal found 5/29$363
Tue 6/119:23 amSTL - IAD
1 stop6h 50mAmerican Airlines
Sun 6/165:00 amIAD - STL
1 stop4h 33mAmerican Airlines
Deal found 5/29$365
Wed 6/195:38 pmSTL - IAD
1 stop5h 21mAmerican Airlines
Mon 6/248:15 pmIAD - STL
1 stop4h 48mAmerican Airlines
Deal found 5/29$374
Sun 6/95:38 pmSTL - IAD
1 stop5h 21mAmerican Airlines
Wed 6/125:00 amIAD - STL
1 stop4h 33mAmerican Airlines
Deal found 5/29$378
Fri 6/75:38 pmSTL - IAD
1 stop5h 21mAmerican Airlines
Sun 6/95:00 amIAD - STL
1 stop4h 33mAmerican Airlines
Deal found 5/29$449

Cheap Delta flights from St. Louis to Dulles Intl

Explore cheap flight options specifically provided by Delta for the route between St. Louis and Dulles Intl. Find affordable fares and compare prices with other airlines to secure the best deal for your journey. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.
Have a look at some of the cheapest available Delta flights departing from St. Louis and landing in Washington, D.C.. Make sure to examine the flight information before completing your reservation.
Wed 7/37:15 amSTL - IAD
1 stop5h 50mDelta
Fri 7/56:10 amIAD - STL
1 stop4h 05mDelta
Deal found 5/29$208
Tue 7/93:50 pmSTL - IAD
1 stop4h 50mDelta
Tue 7/167:11 pmIAD - STL
1 stop5h 28mDelta
Deal found 5/29$218
Mon 7/86:11 pmSTL - IAD
1 stop3h 52mDelta
Tue 7/167:11 pmIAD - STL
1 stop5h 28mDelta
Deal found 5/29$228
Wed 6/266:30 amSTL - IAD
1 stop3h 55mDelta
Tue 7/26:00 amIAD - STL
1 stop4h 09mDelta
Deal found 5/28$233
Wed 7/106:30 amSTL - IAD
1 stop3h 54mDelta
Tue 7/167:11 pmIAD - STL
1 stop5h 28mDelta
Deal found 5/30$243
Thu 6/206:00 amSTL - IAD
1 stop7h 05mDelta
Tue 6/256:00 amIAD - STL
1 stop7h 01mDelta
Deal found 5/28$253
Thu 6/276:30 amSTL - IAD
1 stop25h 43mDelta
Mon 7/16:00 amIAD - STL
1 stop7h 00mDelta
Deal found 5/29$270
Fri 6/286:00 amSTL - IAD
1 stop4h 40mDelta
Sat 7/66:00 amIAD - STL
1 stop4h 09mDelta
Deal found 5/29$273
Sat 6/294:02 pmSTL - IAD
1 stop4h 30mDelta
Sun 6/306:00 amIAD - STL
1 stop4h 10mDelta
Deal found 5/29$278

Cheap St. Louis to Dulles Intl flights in May & June 2024

Find cheap flight options from St. Louis to Dulles Intl specifically for the months of May and June 2024. Explore affordable fares based on user searches. Over the last 7 days, Cheapflights users made 2,784,634 searches. Prices were last updated on May 30, 2024.
The lowest fares we've come across on flights traveling from St. Louis to Washington, D.C. in May and June 2024. More deals are always being added, so be sure to check back regularly.
Tue 6/256:10 pmSTL - IAD
1 stop3h 48mDelta
Mon 7/16:00 amIAD - STL
1 stop7h 00mDelta
Deal found 5/29$198
Wed 6/268:25 amSTL - IAD
Nonstop2h 10mUnited Airlines
Tue 7/26:30 amIAD - STL
1 stop4h 55mUnited Airlines
Deal found 5/28$210
Wed 6/268:25 amSTL - IAD
Nonstop2h 10mUnited Airlines
Tue 7/25:55 pmIAD - STL
Nonstop2h 19mUnited Airlines
Deal found 5/28$214
Wed 6/266:30 amSTL - IAD
1 stop3h 55mDelta
Tue 7/26:00 amIAD - STL
1 stop4h 09mDelta
Deal found 5/28$233
Fri 6/285:30 pmSTL - IAD
1 stop6h 00mUnited Airlines
Fri 7/55:23 pmIAD - STL
1 stop6h 08mUnited Airlines
Deal found 5/29$234
Wed 6/268:25 amSTL - IAD
Nonstop2h 10mUnited Airlines
Wed 7/36:00 amIAD - STL
1 stop5h 23mUnited Airlines
Deal found 5/28$239
Thu 6/206:00 amSTL - IAD
1 stop7h 05mDelta
Tue 6/256:00 amIAD - STL
1 stop7h 01mDelta
Deal found 5/28$253
Wed 6/268:25 amSTL - IAD
Nonstop2h 10mUnited Airlines
Wed 7/38:15 amIAD - STL
Nonstop2h 07mUnited Airlines
Deal found 5/28$263
Thu 6/276:30 amSTL - IAD
1 stop25h 43mDelta
Mon 7/16:00 amIAD - STL
1 stop7h 00mDelta
Deal found 5/29$270

St. Louis to Dulles Intl 2024 flight deals

Discover exclusive flight deals for travel between St. Louis and Dulles Intl in 2024. Find excellent offers based on user searches. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.
The lowest fares we've come across on flights traveling from St. Louis to Washington, D.C. in May and June 2024. More deals are always being added, so be sure to check back regularly.
Wed 7/37:15 amSTL - IAD
1 stop5h 50mDelta
Fri 7/56:10 amIAD - STL
1 stop4h 05mDelta
Deal found 5/29$188
Tue 6/256:10 pmSTL - IAD
1 stop3h 48mDelta
Mon 7/16:00 amIAD - STL
1 stop7h 00mDelta
Deal found 5/29$198
Fri 8/168:25 amSTL - IAD
Nonstop2h 10mUnited Airlines
Tue 8/208:35 amIAD - STL
Nonstop2h 21mUnited Airlines
Deal found 5/30$199
Fri 8/235:20 pmSTL - IAD
1 stop5h 55mUnited Airlines
Sat 8/246:05 pmIAD - STL
Nonstop2h 24mUnited Airlines
Deal found 5/30$204
Wed 7/37:15 amSTL - IAD
1 stop5h 50mDelta
Fri 7/56:10 amIAD - STL
1 stop4h 05mDelta
Deal found 5/29$208
Fri 8/168:25 amSTL - IAD
Nonstop2h 10mUnited Airlines
Tue 8/208:25 amIAD - STL
1 stop7h 28mUnited Airlines
Deal found 5/30$209
Wed 6/268:25 amSTL - IAD
Nonstop2h 10mUnited Airlines
Tue 7/26:30 amIAD - STL
1 stop4h 55mUnited Airlines
Deal found 5/28$210
Wed 6/268:25 amSTL - IAD
Nonstop2h 10mUnited Airlines
Tue 7/25:55 pmIAD - STL
Nonstop2h 19mUnited Airlines
Deal found 5/28$214
Tue 7/93:50 pmSTL - IAD
1 stop4h 50mDelta
Tue 7/167:11 pmIAD - STL
1 stop5h 28mDelta
Deal found 5/29$218

Non-stop flights to Dulles Intl from St. Louis

Discover non-stop flight options from St. Louis to Dulles Intl. Find direct flights with no layovers, providing a convenient travel experience. Explore non-stop flight options based on user searches, and compare prices and availability for your desired travel dates. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.
For a quicker trip, book one of these direct flights from St. Louis to Washington, D.C.. Select from other flights from St. Louis to Washington, D.C. by using the search form above.
Fri 8/168:25 amSTL - IAD
Nonstop2h 10mUnited Airlines
Tue 8/208:35 amIAD - STL
Nonstop2h 21mUnited Airlines
Deal found 5/30$199
Wed 6/268:25 amSTL - IAD
Nonstop2h 10mUnited Airlines
Tue 7/25:55 pmIAD - STL
Nonstop2h 19mUnited Airlines
Deal found 5/28$214
Tue 8/138:25 amSTL - IAD
Nonstop2h 10mUnited Airlines
Wed 8/148:15 amIAD - STL
Nonstop2h 07mUnited Airlines
Deal found 5/29$255
Fri 8/231:15 pmSTL - IAD
Nonstop2h 08mUnited Airlines
Sat 8/246:05 pmIAD - STL
Nonstop2h 24mUnited Airlines
Deal found 5/30$256
Wed 6/268:25 amSTL - IAD
Nonstop2h 10mUnited Airlines
Wed 7/38:15 amIAD - STL
Nonstop2h 07mUnited Airlines
Deal found 5/28$263
Tue 7/98:25 amSTL - IAD
Nonstop2h 10mUnited Airlines
Tue 7/168:15 amIAD - STL
Nonstop2h 07mUnited Airlines
Deal found 5/29$266
Wed 7/318:25 amSTL - IAD
Nonstop2h 10mUnited Airlines
Thu 8/158:15 amIAD - STL
Nonstop2h 07mUnited Airlines
Deal found 5/30$269
Sat 7/68:25 amSTL - IAD
Nonstop2h 10mUnited Airlines
Tue 7/168:15 amIAD - STL
Nonstop2h 07mUnited Airlines
Deal found 5/29$294
Tue 6/258:25 amSTL - IAD
Nonstop2h 10mUnited Airlines
Mon 7/15:55 pmIAD - STL
Nonstop2h 19mUnited Airlines
Deal found 5/29$306

St. Louis to Dulles Intl flights leaving soon

Find last-minute flight options from St. Louis to Dulles Intl for spontaneous travel. Discover available flights and compare prices based on user searches. Secure great deals and offers for spontaneous trips with quick booking options. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.
Consider one of these great deals we found on last-minute flights from St. Louis to Washington, D.C.. Users should be sure to double check the price, date, and time of their last-minute flight.
Wed 6/55:38 pmSTL - IAD
1 stop5h 21mAmerican Airlines
Wed 6/125:00 amIAD - STL
1 stop4h 33mAmerican Airlines
Deal found 5/29$353
Sun 6/95:38 pmSTL - IAD
1 stop5h 21mAmerican Airlines
Wed 6/125:00 amIAD - STL
1 stop4h 33mAmerican Airlines
Deal found 5/29$378
Thu 6/67:45 amSTL - IAD
2 stops6h 49mMultiple Airlines
Fri 6/712:33 pmIAD - STL
1 stop5h 38mMultiple Airlines
Deal found 5/29$390
Wed 6/51:55 pmSTL - IAD
2 stops20h 18mMultiple Airlines
Fri 6/712:33 pmIAD - STL
1 stop5h 38mMultiple Airlines
Deal found 5/29$391
Sun 6/96:05 pmSTL - IAD
1 stop14h 52mSun Country Air
Thu 6/1312:40 pmIAD - STL
1 stop25h 01mSun Country Air
Deal found 5/28$395
Sun 6/96:05 pmSTL - IAD
1 stop14h 52mMultiple Airlines
Wed 6/1211:16 amIAD - STL
3 stops25h 29mMultiple Airlines
Deal found 5/29$396
Wed 6/51:55 pmSTL - IAD
3 stops25h 15mMultiple Airlines
Fri 6/712:33 pmIAD - STL
1 stop5h 38mMultiple Airlines
Deal found 5/28$401
Wed 6/58:25 amSTL - IAD
Nonstop2h 10mUnited Airlines
Thu 6/138:20 amIAD - STL
Nonstop2h 12mUnited Airlines
Deal found 5/29$407
Wed 6/58:25 amSTL - IAD
Nonstop2h 10mUnited Airlines
Wed 6/126:14 amIAD - STL
1 stop5h 43mUnited Airlines
Deal found 5/29$417

One-way flights to Dulles Intl from St. Louis

Search for one-way flight options from St. Louis to Dulles Intl. Find affordable one-way fares based on user searches. Compare prices and availability to plan your one-way journey according to your preferred dates and budget. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.
If you're seeking multiple options on one-way flights from St. Louis to Washington, D.C., be sure to check out these deals, which are updated often. Users needing a return flight from St. Louis to Washington, D.C. should utilize the search form above.
Tue 7/211:25 amSTL - IAD
1 stop5h 01mDelta
Deal found 5/30$94
Tue 8/68:25 amSTL - IAD
Nonstop2h 10mUnited Airlines
Deal found 5/30$95
Tue 8/610:08 amSTL - IAD
1 stop4h 51mDelta
Deal found 5/29$104
Sat 7/273:49 pmSTL - IAD
1 stop4h 51mDelta
Deal found 5/30$114
Tue 7/28:25 amSTL - IAD
Nonstop2h 10mUnited Airlines
Deal found 5/29$120
Fri 7/125:25 pmSTL - IAD
1 stop17h 45mSun Country Air
Deal found 5/30$128
Sat 7/68:25 amSTL - IAD
Nonstop2h 10mUnited Airlines
Deal found 5/29$129
Thu 8/16:30 amSTL - IAD
1 stop4h 22mUnited Airlines
Deal found 5/30$135
Sat 6/294:02 pmSTL - IAD
1 stop4h 30mDelta
Deal found 5/29$139

Find flights from St. Louis to Dulles Intl within your budget

Customize your flight search to find flights from St. Louis to Dulles Intl that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.

Fly from

Any airport

Fly to

Any airport

Budget

$208 - $318

Route

Depart

Return

Price

Lambert-St LouisWashington, D.C. Dulles Intl

STL - IAD

STLIAD

Lambert-St Louis

Wed 7/3

1 stop5h 50m

Washington, D.C. Dulles Intl

Fri 7/5

1 stop4h 05m

$208

Lambert-St LouisWashington, D.C. Dulles Intl

STL - IAD

STLIAD

Lambert-St Louis

Wed 6/26

Nonstop2h 10m

Washington, D.C. Dulles Intl

Tue 7/2

1 stop4h 55m

$210

Lambert-St LouisWashington, D.C. Dulles Intl

STL - IAD

STLIAD

Lambert-St Louis

Wed 6/26

Nonstop2h 10m

Washington, D.C. Dulles Intl

Tue 7/2

Nonstop2h 19m

$214

Lambert-St LouisWashington, D.C. Dulles Intl

STL - IAD

STLIAD

Lambert-St Louis

Tue 7/9

1 stop4h 50m

Washington, D.C. Dulles Intl

Tue 7/16

1 stop5h 28m

$218

Lambert-St LouisWashington, D.C. Dulles Intl

STL - IAD

STLIAD

Lambert-St Louis

Wed 7/3

Nonstop2h 10m

Washington, D.C. Dulles Intl

Sat 7/6

1 stop6h 20m

$220

Lambert-St LouisWashington, D.C. Dulles Intl

STL - IAD

STLIAD

Lambert-St Louis

Mon 7/8

1 stop3h 52m

Washington, D.C. Dulles Intl

Tue 7/16

1 stop5h 28m

$228

Lambert-St LouisWashington, D.C. Dulles Intl

STL - IAD

STLIAD

Lambert-St Louis

Sun 6/16

1 stop5h 23m

Washington, D.C. Dulles Intl

Tue 6/18

1 stop27h 56m

$305

Lambert-St LouisWashington, D.C. Dulles Intl

STL - IAD

STLIAD

Lambert-St Louis

Wed 7/10

2 stops10h 04m

Washington, D.C. Dulles Intl

Tue 7/16

1 stop4h 19m

$314

Lambert-St LouisWashington, D.C. Dulles Intl

STL - IAD

STLIAD

Lambert-St Louis

Wed 6/19

3 stops22h 11m

Washington, D.C. Dulles Intl

Mon 6/24

3 stops21h 48m

$318

Flights are sorted by cheapest first

Deals found on 5/29

How far ahead should I book a flight from St. Louis to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the optimal time to book a round-trip flight from St. Louis to Dulles Intl. Price data was last updated on May 24, 2024.
The best time to book flights from St. Louis to Washington, D.C. Dulles Intl Airport is 51 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
Search Deals

What is the cheapest day to fly from St. Louis to Washington, D.C. Dulles Intl Airport?

Use this chart to determine the cheapest time to fly round-trip from St. Louis to Dulles Intl. Price data was last updated on May 26, 2024.
Morning
Noon
Afternoon
Evening
All times are departure.
Travelers seeking maximum savings on their St. Louis to Washington, D.C. Dulles Intl Airport flight should consider departing on Saturday afternoons when fares are most often at their lowest. Thursday at noon flights should be avoided if possible as fares are typically the most expensive at this time.
Search Deals

Best time to book a flight from St. Louis to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from St. Louis with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Temperature and rainfall in Dulles Intl by month

Plan your trip to Dulles Intl by taking into account the average temperature and rainfall totals by month.

WAS

Temperature

35.6 - 80.6 °F

Reviews of airlines servicing Dulles Intl

Get insights into the airlines that provide service to Dulles Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Dulles Intl. Reviews last updated May 30, 2024.
To help decide which airline to fly from St. Louis to Washington, D.C., see what other customers have to say about American Airlines, Delta and United Airlines. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
10,457 reviews
Check prices

Food

7.4

Boarding

8.2

Entertainment

8.0

Overall

8.0

Comfort

7.9

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Delta
8.0
Very good
10,457 reviews
Delta
8.0
Very good
10,457 reviews
Check prices

Food

7.4

Boarding

8.2

Entertainment

8.0

Overall

8.0

Comfort

7.9

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Qatar Airways
7.7
Good
4,339 reviews
Delta
8.0
Very good
10,457 reviews
Check prices

Food

7.4

Boarding

8.2

Entertainment

8.0

Overall

8.0

Comfort

7.9

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

United Airlines
7.4
Good
10,777 reviews
Delta
8.0
Very good
10,457 reviews
Check prices

Food

7.4

Boarding

8.2

Entertainment

8.0

Overall

8.0

Comfort

7.9

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

American Airlines
7.3
Good
14,284 reviews
Delta
8.0
Very good
10,457 reviews
Check prices

Food

7.4

Boarding

8.2

Entertainment

8.0

Overall

8.0

Comfort

7.9

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Sun Country Air
7.2
Good
597 reviews
Delta
8.0
Very good
10,457 reviews
Check prices

Food

7.4

Boarding

8.2

Entertainment

8.0

Overall

8.0

Comfort

7.9

Crew

8.6

Reviews

1 / 10

When I was going to board, one of the staff members told me that I could not board with my passport bag because it was tree items and I would need to check a bag. This was so stupid ! The bag was small. So I had to put my things in my pockets, put the funny bag inside the other bag. Then go throw it. Then in the plane put everything back again in my funny bag.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Dulles Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly from for flights from St. Louis to Washington, D.C. Dulles Intl?

    Most people fly from Lambert-St Louis (STL) if they book a flight from St. Louis to Washington, D.C. Dulles Intl. On average, Lambert-St Louis has 5 outbound flights to Washington, D.C. Dulles Intl per day from 3 airlines. Lambert-St Louis is conveniently located just 12.7 mi from St. Louis’s city center.

  • Can I find flights from St. Louis to Washington, D.C. Dulles Intl Airport for under $300 on Cheapflights?

    Yes, there are multiple flights from St. Louis to Washington, D.C. Dulles Intl Airport for under $300. The cheapest flight booked recently is on Delta for just $208, but on average you can expect to pay $239.

  • Are there nonstop flights from St. Louis to Washington, D.C. Dulles Intl Airport for under $200 on Cheapflights?

    Cheapflights has at least 20 direct flights from St. Louis to Washington, D.C. Dulles Intl Airport under $200. A good price for a nonstop flight from St. Louis to Washington, D.C. Dulles Intl Airport is less than $321.

  • Are there last-minute flights available from St. Louis to Washington, D.C. Dulles Intl Airport for under $400?

    There are currently 20+ open flights from St. Louis to Washington, D.C. Dulles Intl Airport within the next 7 days for less than $400.

  • What are the cheapest airlines flying from St. Louis to Washington, D.C. Dulles Intl Airport round-trip?

    Currently priced at $208, Delta will fly you from St. Louis to Washington, D.C. Dulles Intl Airport and back. In addition to Delta, many other airlines offer competitively priced options for your trip. Check Cheapflights for deals on United Airlines for as low as $210. Delta is 45% cheaper than the average price of flights available within the next 90 days to this destination.

  • What are the cheapest airlines to fly from St. Louis to Washington, D.C. Dulles Intl Airport one-way?

    To fly one-way, consider booking your trip with Delta, which is currently one of the cheapest options available, starting at $94. United Airlines flights start at $95 while deals on Sun Country Air start at $128 one-way.

  • What are the most reliable airlines from St. Louis to Washington, D.C. Dulles Intl Airport?

    No one likes to see their flight delayed. When booking a flight from St. Louis to Washington, D.C. Dulles Intl Airport consider choosing Avianca (98%), Copa Airlines (98%) or GoJet (93%) as they are the most reliable in getting you off to your destination on time.

  • What are the cheapest flights from St. Louis to Washington, D.C. Dulles Intl Airport?

    On average you can expect to pay $2,101 for a flight from St. Louis to Washington, D.C. Dulles Intl Airport. The cheapest flight overall is $154 while the most popular route, (Lambert-St Louis - Washington, D.C. Dulles Intl) is currently priced at $188.

  • What does STL to IAD mean?

    This is defined as Lambert-St Louis Airport (STL) and Washington, D.C. Dulles Intl Airport (IAD). Codes like Washington, D.C. Dulles Intl Airport are often used to just call airports uniquely.

  • Can I find deals for flights from St. Louis to Dulles Intl that include extra baggage allowance?

    The amount of baggage you can bring on your St. Louis to Dulles Intl flight depends on the airline and the type of fare you've chosen. After entering your flight details, you'll be able to view the specific baggage policies for each deal in the search results. Keep in mind that certain deals may offer additional baggage allowance.

  • Can I find deals on flights from St. Louis to Dulles Intl with specific airlines?

    Yes, Cheapflights allows you to browse and filter St. Louis to Dulles Intl flight deals by airline. After entering your origin and destination, use the available filters to view flights offered by airlines.

  • Can I find deals for flights from St. Louis to Dulles Intl that include hotel bookings?

    Yes. In addition to deals on St. Louis to Dulles Intl flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from St. Louis to Dulles Intl?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from St. Louis to Dulles Intl.

  • Can I find deals for business class flights from St. Louis to Dulles Intl?

    Yes. Cheapflights offers flight deals from St. Louis to Dulles Intl by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • Can I find deals for flights from St. Louis to Dulles Intl that allow pets onboard?

    Many airlines flying from St. Louis to Dulles Intl offer the option to travel with pets. After selecting a flight deal, you can find more information about the airline's pet policy on their official website or by contacting the airline directly. Please note that additional fees and restrictions may apply.

  • Can I find deals on last-minute flights from St. Louis to Dulles Intl?

    Yes, you can often find last-minute deals on St. Louis to Dulles Intl flights on Cheapflights. However, these deals can vary and may not always be available. We recommend checking back frequently or signing up for price alerts for the most up-to-date deals.

  • How recently were the St. Louis to Washington, D.C. Dulles Intl Airport flight deals updated?

    The St. Louis to Washington, D.C. Dulles Intl Airport flight deals you see on this page were last updated on 5/30.

  • What are the most popular airlines that fly from St. Louis to Washington, D.C. Dulles Intl Airport?

    American Airlines, Delta and United Airlines are the most popular airlines when flying from St. Louis to Washington, D.C. Dulles Intl Airport.

  • What is the cheapest month to book a flight from St. Louis to Washington, D.C. Dulles Intl Airport?

    Currently, September is the cheapest month in which you can book a flight from St. Louis to Washington, D.C. Dulles Intl Airport (average of $278). Flying from St. Louis to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $388). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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See prices for flight routes from nearby airports that may be better suited for you.

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Top 3 airlines flying from St. Louis to Dulles Intl

Discover the top 3 airlines that operate flights from St. Louis to Dulles Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,784,634 searches. Data last updated May 30, 2024.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$177Average$282FlexibilityNo cancel feeOn-timeN/A
Search Delta flights
United AirlinesCheapest$195Average$435FlexibilityNo cancel feeOn-time69%
Search United Airlines flights
American AirlinesCheapest$221Average$317FlexibilityNo cancel feeOn-time71%
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Search flights from St. Louis to Dulles Intl by cabin class

Find flights from St. Louis to Dulles Intl, based on your preferred cabin class, be it economy, premium economy, business, or first class.
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Hourly flight availability from St. Louis to Dulles Intl

Find hourly flight availability from St. Louis to Dulles Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated May 30, 2024.
0%of flight departuresEarly morningMidnight to 6 am
80%of flight departuresMorning6 am to noon
20%of flight departuresAfternoonNoon to 6 pm
0%of flight departuresEvening6 pm to midnight
Midnight
6 AM
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6 PM

Weekly flight availability from St. Louis to Dulles Intl

Explore weekly flight availability from St. Louis to Dulles Intl. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated May 30, 2024.
Sunday5daily flights
Monday6daily flights
Tuesday5daily flights
Wednesday6daily flights
Thursday5daily flights
Friday6daily flights
Saturday4daily flights

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How does Cheapflights help users find flights from St. Louis to Dulles Intl?

Cheapflights makes it easy to find St. Louis to Dulles Intl flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

Why should you use Cheapflights to find cheap flight tickets from St. Louis to Dulles Intl?

By finding flights from multiple airlines and providers at completely no cost, Cheapflights helps millions of users like you annually find the best flights to Dulles Intl from St. Louis.

Can Cheapflights find flights from St. Louis to Dulles Intl with no change fees?

Yes, we can. To see specific flights from St. Louis to Dulles Intl with no change fees, users can toggle flexible booking options after using the search form above to find flights.

Can Cheapflights notify me if prices for flights from St. Louis to Dulles Intl become cheaper?

Yes, Cheapflights has a feature called Price Alert, which notifies users when flight prices change. Track prices for your flight to Dulles Intl from St. Louis today and book when prices fit your budget.

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