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Delaware

$96+ Cheap flights from St. Louis (STL) to Delaware

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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
STL — ILG
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
1 adult, Economy
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Cheap flight deals from St. Louis to Delaware

Keep the following information in mind while searching for St. Louis to Delaware flight deals. Data was last updated March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$332
(Mytrip)

One-way from

$96
(Cheapflightsfares)

Popular in

December

Cheapest in

June

Average price

$417
Provider with most accurate pricing for Lambert-St Louis-Philadelphia flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-Philadelphia flights.
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From Lambert-St Louis to Delaware
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One-way flight from Lambert-St Louis to Delaware
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Highest demand for flights based on searches. 16% potential increase in price ($65 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Find flight deals from St. Louis to Delaware

Cheapest flights from St. Louis to Delaware
Explore the most affordable flight options available from St. Louis to Delaware. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 28, 2025.

This Mytrip deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/259:50 amSTL - PHL
2 stops13h 19mMultiple Airlines
Sun 4/277:05 pmPHL - STL
3 stops24h 36mMultiple Airlines
Deal found 3/27$332
This American Airlines deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/176:15 amSTL - PHL
Nonstop2h 12mAmerican Airlines
Thu 4/247:20 pmPHL - STL
Nonstop2h 38mAmerican Airlines
Deal found 3/27$337
This Frontier deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/117:24 pmSTL - PHL
1 stop8h 46mFrontier
Sat 6/146:30 amPHL - STL
1 stop8h 27mFrontier
Deal found 3/27$359
This Southwest deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/46:25 amSTL - PHL
2 stops8h 30mSouthwest
Wed 6/1110:05 amPHL - STL
1 stop6h 05mSouthwest
Deal found 3/27$362
This United deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/306:30 amSTL - PHL
2 stops11h 29mUnited Airlines
Mon 5/56:30 amPHL - STL
1 stop9h 17mUnited Airlines
Deal found 3/27$438
This American Airlines deal was found by Cheapflights users on 3/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/255:14 pmSTL - SBY
1 stop3h 53mAmerican Airlines
Fri 8/15:00 amSBY - STL
1 stop4h 14mAmerican Airlines
Deal found 3/26$601
This Delta deal was found by Cheapflights users on 3/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/187:20 amSTL - PHL
1 stop5h 14mDelta
Thu 8/219:42 amPHL - STL
1 stop4h 34mDelta
Deal found 3/27$787

Cheapflights Fare Finder

Customize your flight search to find flights from St. Louis to Delaware 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 2,558,603 searches. Data last updated March 28, 2025.
Use the filters below to find and compare flights from St. Louis to Delaware that are best for you.

Fly from

St. Louis

Fly to

Delaware

Route

Depart

Return

Price

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Fri 4/25

9:50 am-12:09 am

2 stops13h 19m

Philadelphia

Sun 4/27

7:05 pm-6:41 pm

3 stops24h 36m

$332

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Thu 4/17

6:15 am-9:27 am

Nonstop2h 12m

Philadelphia

Thu 4/24

7:20 pm-8:58 pm

Nonstop2h 38m

$337

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Wed 6/11

7:24 pm-5:10 am

1 stop8h 46m

Philadelphia

Sat 6/14

6:30 am-1:57 pm

1 stop8h 27m

$359

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Wed 6/4

6:25 am-3:55 pm

2 stops8h 30m

Philadelphia

Wed 6/11

10:05 am-3:10 pm

1 stop6h 05m

$362

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Wed 4/30

6:30 am-6:59 pm

2 stops11h 29m

Philadelphia

Mon 5/5

6:30 am-2:47 pm

1 stop9h 17m

$438

St. LouisSalisbury

STL - SBY

STLSBY

Lambert-St Louis

Fri 7/25

5:14 pm-10:07 pm

1 stop3h 53m

Salisbury-Ocean City

Fri 8/1

5:00 am-8:14 am

1 stop4h 14m

$601

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Mon 8/18

7:20 am-1:34 pm

1 stop5h 14m

Philadelphia

Thu 8/21

9:42 am-1:16 pm

1 stop4h 34m

$787

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Wed 5/28

3:03 pm-5:40 am

1 stop13h 37m

Philadelphia

Sun 6/1

8:40 am-10:15 pm

2 stops14h 35m

$8,048

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Thu 5/8

10:10 am-10:43 pm

1 stop11h 33m

$96

St. LouisPhiladelphia

STL - PHL

STLPHL

Lambert-St Louis

Wed 5/21

5:45 pm-7:40 am

1 stop12h 55m

$105

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 16 results
1
2

Best time to book a flight from St. Louis to Delaware

Have a flexible travel schedule? Discover the best time to fly to Delaware 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.

Cheapflights Insights

Everything you need to know about your flight from St. Louis to Delaware

Rainfall in Delaware by month

Plan your trip to Delaware by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Delaware ranges from 2.9 - 4.3 inches per month. July is typically the wettest month, when rainfall can reach 4.3 in. February is typically the driest time to visit Delaware when rainfall is around 2.9 in.

Temperature in Delaware by month

Plan your trip to Delaware by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Delaware, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 77.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

Reviews of airlines servicing Delaware

Get insights into the airlines that provide service to Delaware. 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 Delaware. Reviews last updated March 28, 2025.
Read through reviews of airlines operating flights from St. Louis to Delaware, such as Southwest, Delta and United Airlines. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,274 reviews

Comfort

8.1

Crew

8.7

Food

7.1

Entertainment

7.6

Boarding

8.2

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.1
Very good
4,274 reviews
Southwest
8.1
Very good
4,274 reviews

Comfort

8.1

Crew

8.7

Food

7.1

Entertainment

7.6

Boarding

8.2

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very good
7,897 reviews
Southwest
8.1
Very good
4,274 reviews

Comfort

8.1

Crew

8.7

Food

7.1

Entertainment

7.6

Boarding

8.2

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,603 reviews
Southwest
8.1
Very good
4,274 reviews

Comfort

8.1

Crew

8.7

Food

7.1

Entertainment

7.6

Boarding

8.2

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
American Airlines
7.2
Good
10,000 reviews
Southwest
8.1
Very good
4,274 reviews

Comfort

8.1

Crew

8.7

Food

7.1

Entertainment

7.6

Boarding

8.2

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Spirit Airlines
6.3
Okay
7,882 reviews
Southwest
8.1
Very good
4,274 reviews

Comfort

8.1

Crew

8.7

Food

7.1

Entertainment

7.6

Boarding

8.2

Overall

8.1

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

Related info for your journey

Find useful and relevant information for your journey from St. Louis to Delaware. 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 Delaware?

    Located just 12.7 mi from the city center, Lambert-St Louis (STL) is the airport most travelers will use when flying to Delaware from St. Louis.

  • What are the cheapest airlines to fly from St. Louis to Delaware one-way?

    For one-way options, check prices for Spirit Airlines. According to our data, you can fly for as low as $96. Users have also found prices from $105 and $169 on Frontier and American Airlines, respectively.

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

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

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

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

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

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

See more FAQs

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