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Dulles Intl

$70+ Cheap flights from Illinois to Dulles Intl (IAD)

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 1/5. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — IAD
Nov 26 — Dec 31
Tue 11/26
Tue 12/3
1 adult, Economy
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Cheap flight deals from Illinois to Dulles Intl

Discover tips and strategies to find the most affordable flight options for your journey from Illinois (USIL) 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 November 21, 2024.

Find flight deals from Illinois to Dulles Intl

Cheapest flights from Illinois to Dulles Intl
Explore the most affordable flight options available from Illinois to Dulles Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 21, 2024.

This Travelocity deal was found by Cheapflights users on 11/21. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/172:20 pmMDW - IAD
1 stop6h 00mFrontier
Wed 12/183:25 pmIAD - MDW
1 stop6h 52mFrontier
Deal found 11/21$138
This Frontier deal was found by Cheapflights users on 11/20. 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.
Fri 12/1310:59 amORD - IAD
1 stop6h 20mFrontier
Wed 12/183:25 pmIAD - ORD
1 stop7h 20mFrontier
Deal found 11/20$138
This United Airlines deal was found by Cheapflights users on 11/19. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/183:56 pmORD - IAD
Nonstop1h 54mUnited Airlines
Wed 1/81:15 pmIAD - ORD
Nonstop2h 19mUnited Airlines
Deal found 11/19$197
This Delta deal was found by Cheapflights users on 11/21. 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.
Wed 12/115:50 pmMDW - IAD
1 stop4h 35mDelta
Wed 12/186:00 amIAD - MDW
1 stop3h 58mDelta
Deal found 11/21$216
This Delta deal was found by Cheapflights users on 11/19. 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.
Tue 12/175:40 amORD - IAD
1 stop5h 10mDelta
Tue 1/73:05 pmIAD - ORD
1 stop7h 53mDelta
Deal found 11/19$216
This CheapOair deal was found by Cheapflights users on 11/20. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/55:02 pmSTL - IAD
1 stop24h 17mFrontier
Sun 12/85:57 pmIAD - STL
1 stop6h 27mFrontier
Deal found 11/20$218
This American Airlines deal was found by Cheapflights users on 11/20. 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 12/56:10 pmMLI - IAD
1 stop4h 45mAmerican Airlines
Wed 12/115:28 pmIAD - MLI
1 stop7h 27mAmerican Airlines
Deal found 11/20$233
This United Airlines deal was found by Cheapflights users on 11/19. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/238:25 amSTL - IAD
Nonstop2h 18mUnited Airlines
Sun 12/298:35 amIAD - STL
1 stop6h 49mUnited Airlines
Deal found 11/19$239
This Delta deal was found by Cheapflights users on 11/21. 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.
Sat 12/147:15 amSTL - IAD
1 stop6h 21mDelta
Sat 1/45:27 pmIAD - STL
1 stop5h 16mDelta
Deal found 11/21$248
This Delta deal was found by Cheapflights users on 11/20. 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.
Wed 12/45:06 pmMLI - IAD
1 stop6h 00mDelta
Thu 12/127:09 pmIAD - MLI
1 stop4h 52mDelta
Deal found 11/20$253
This American Airlines deal was found by Cheapflights users on 11/19. 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.
Wed 12/111:54 pmORD - IAD
1 stop4h 34mAmerican Airlines
Wed 12/185:00 amIAD - ORD
1 stop4h 49mAmerican Airlines
Deal found 11/19$256
This United Airlines deal was found by Cheapflights users on 11/20. 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 Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/46:45 amPIA - IAD
1 stop3h 59mUnited Airlines
Sun 12/88:20 amIAD - PIA
1 stop6h 45mUnited Airlines
Deal found 11/20$258

Find flights from Illinois to Dulles Intl within your budget

Customize your flight search to find flights from Illinois 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 2,612,795 searches. Data last updated November 21, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

ChicagoWashington, D.C.

MDW - IAD

MDWIAD

Chicago Midway

Sun 1/5

5:52 pm-2:34 pm

1 stop19h 42m

Washington, D.C. Dulles Intl

Sun 1/12

5:57 pm-10:21 am

1 stop17h 24m

$136

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Sun 1/5

7:29 pm-7:11 am

1 stop10h 42m

Washington, D.C. Dulles Intl

Sun 1/12

5:57 pm-4:38 pm

1 stop23h 41m

$136

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Wed 12/18

3:56 pm-6:50 pm

Nonstop1h 54m

Washington, D.C. Dulles Intl

Wed 1/8

1:15 pm-2:34 pm

Nonstop2h 19m

$197

PeoriaWashington, D.C.

PIA - IAD

PIAIAD

Greater Peoria

Sat 2/8

3:33 pm-10:41 pm

1 stop6h 08m

Washington, D.C. Dulles Intl

Wed 2/12

9:11 am-3:50 pm

1 stop7h 39m

$208

MolineWashington, D.C.

MLI - IAD

MLIIAD

Moline Quad-City

Tue 2/4

3:28 pm-10:41 pm

1 stop6h 13m

Washington, D.C. Dulles Intl

Sat 2/8

9:11 am-4:03 pm

1 stop7h 52m

$208

ChicagoWashington, D.C.

MDW - IAD

MDWIAD

Chicago Midway

Wed 1/8

6:28 pm-11:16 pm

1 stop3h 48m

Washington, D.C. Dulles Intl

Fri 1/31

6:00 am-8:54 am

1 stop3h 54m

$216

ChicagoWashington, D.C.

ORD - IAD

ORDIAD

Chicago O'Hare Intl

Wed 1/8

5:45 am-12:46 pm

1 stop6h 01m

Washington, D.C. Dulles Intl

Sat 1/11

6:05 am-10:43 am

1 stop5h 38m

$216

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Thu 12/5

5:02 pm-6:19 pm

1 stop24h 17m

Washington, D.C. Dulles Intl

Sun 12/8

5:57 pm-11:24 pm

1 stop6h 27m

$218

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Thu 1/2

8:25 am-11:43 am

Nonstop2h 18m

Washington, D.C. Dulles Intl

Sat 1/4

6:50 pm-8:23 pm

Nonstop2h 33m

$229

St. LouisWashington, D.C.

STL - IAD

STLIAD

Lambert-St Louis

Wed 3/5

12:52 pm-9:05 pm

1 stop7h 13m

Washington, D.C. Dulles Intl

Sat 3/15

6:05 am-9:43 am

1 stop4h 38m

$248

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/20

Showing 1-10 of 58 results
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Best time to book a flight from Illinois to Dulles Intl

Have a flexible travel schedule? Discover the best time to fly to Dulles Intl from Illinois 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.

Travel insights for flights from Illinois to Dulles Intl

Get recent, data-driven insights about flights from Illinois to Dulles Intl including ideal travel times, pricing trends, and more.

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

Currently, November is the cheapest month in which you can book a flight from Illinois to Washington, D.C. Dulles Intl Airport (average of $299). Flying from Illinois to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $377). 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.

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

Find hourly flight availability from Illinois 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 November 21, 2024.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Washington, D.C. Dulles Intl Airport as you normally would.

Rainfall in Dulles Intl by month

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

In terms of precipitation, rainfall in Washington, D.C. Dulles Intl Airport ranges from 2.6 - 4.0 inches per month. May is typically the wettest month, when rainfall can reach 4.0 in. February is typically the driest time to visit Washington, D.C. Dulles Intl Airport when rainfall is around 2.6 in.

Temperature in Dulles Intl by month

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

If weather is an important factor for your trip to Washington, D.C. Dulles Intl Airport, 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 80.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 35.6 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 November 21, 2024.
See what other customers who have flown with Porter Airlines, Frontier and United Airlines from Illinois to Washington, D.C. have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
5,005 reviews

Food

7.2

Boarding

8.2

Entertainment

7.7

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Southwest
8.1
Very good
5,005 reviews
Southwest
8.1
Very good
5,005 reviews

Food

7.2

Boarding

8.2

Entertainment

7.7

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Delta
8.0
Very good
8,755 reviews
Southwest
8.1
Very good
5,005 reviews

Food

7.2

Boarding

8.2

Entertainment

7.7

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Porter Airlines
7.8
Good
288 reviews
Southwest
8.1
Very good
5,005 reviews

Food

7.2

Boarding

8.2

Entertainment

7.7

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Air Transat
7.8
Good
389 reviews
Southwest
8.1
Very good
5,005 reviews

Food

7.2

Boarding

8.2

Entertainment

7.7

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

United Airlines
7.4
Good
9,172 reviews
Southwest
8.1
Very good
5,005 reviews

Food

7.2

Boarding

8.2

Entertainment

7.7

Overall

8.1

Comfort

8.1

Crew

8.7

Reviews

1 / 10

Great service throughout our flight. Easy boarding with early bird check in

Related info for your journey

Find useful and relevant information for your journey from Illinois 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 are the cheapest airlines to fly from Illinois to Washington, D.C. Dulles Intl Airport one-way?

    To fly one-way, consider booking your trip with Frontier, which is currently one of the cheapest options available, starting at $70. United Airlines flights start at $99 while deals on Delta start at $104 one-way.

  • What are the most popular routes from Illinois to Washington, D.C. Dulles Intl Airport?

    The most popular flight routes from Illinois to Washington, D.C. Dulles Intl Airport are Chicago O'Hare Intl - Washington, D.C. Dulles Intl, Chicago Midway - Washington, D.C. Dulles Intl and Lambert-St Louis - Washington, D.C. Dulles Intl.

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

    The top 3 most reliable airlines when flying from Illinois to Washington, D.C. Dulles Intl Airport are Emirates (100%), Air China (100%) and Avianca (97%).

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

    The cheapest flight price from Illinois to Washington, D.C. Dulles Intl Airport is $114. On average you can expect to pay $802. The most popular route, (Chicago O'Hare Intl - Washington, D.C. Dulles Intl), can usually be booked for $178.

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

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

  • How can I find direct flights from Illinois to Dulles Intl?

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

  • Can I find deals for business class flights from Illinois to Dulles Intl?

    Yes. Cheapflights offers flight deals from Illinois 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.

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

    Currently, November is the cheapest month in which you can book a flight from Illinois to Washington, D.C. Dulles Intl Airport (average of $299). Flying from Illinois to Washington, D.C. Dulles Intl Airport in June is currently the most expensive (average of $377). 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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Alternative routes for Illinois to Dulles Intl

See prices for flight routes from nearby airports that may be better suited for you.
Dallas/Fort Worth to Baltimore flights
Los Angeles to Dulles Intl flights
Los Angeles to Reagan-National flights
Dallas/Fort Worth to Dulles Intl flights
Los Angeles to Baltimore flights
Boston to Dulles Intl flights
Dallas/Fort Worth to Reagan-National flights
Hobby to Baltimore flights
Atlanta to Dulles Intl flights
Seattle to Dulles Intl flights
San Francisco to Dulles Intl flights
San Francisco to Reagan-National flights
Boston to Reagan-National flights
Atlanta to Reagan-National flights
Seattle to Reagan-National flights
San Francisco to Baltimore flights
Boston to Baltimore flights
Fort Lauderdale to Baltimore flights
Hobby to Reagan-National flights
O'Hare Intl to Dulles Intl flights
O'Hare Intl to Baltimore flights
Atlanta to Baltimore flights
Orlando to Dulles Intl flights
Orlando to Reagan-National flights
Miami to Reagan-National flights
George Bush Intcntl to Baltimore flights
Seattle to Baltimore flights
Hobby to Dulles Intl flights
O'Hare Intl to Reagan-National flights
John F Kennedy Intl to Reagan-National flights
Denver to Baltimore flights
George Bush Intcntl to Dulles Intl flights
Denver to Dulles Intl flights
Denver to Reagan-National flights
Newark to Dulles Intl flights
Detroit to Baltimore flights
Miami to Baltimore flights
Austin to Dulles Intl flights
Charlotte to Dulles Intl flights
Fort Lauderdale to Dulles Intl flights
Orlando to Baltimore flights
LaGuardia to Reagan-National flights
George Bush Intcntl to Reagan-National flights
San Diego to Dulles Intl flights
Minneapolis to Baltimore flights
Miami to Dulles Intl flights
Burbank to Baltimore flights
Tampa to Reagan-National flights
Tampa to Dulles Intl flights
Fort Lauderdale to Reagan-National flights

Top 4 airlines flying from Illinois to Dulles Intl

Discover the top 4 airlines that operate flights from Illinois 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 2,612,795 searches. Data last updated November 21, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$54Average$164FlexibilityNo cancel feeOn-time62%
American AirlinesCheapest$121Average$318FlexibilityNo cancel feeOn-time71%
DeltaCheapest$175Average$381FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$179Average$415FlexibilityNo cancel feeOn-time69%
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