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$68+ Cheap flights from Dulles Intl (IAD) to Illinois

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 2/19. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — ORD
Nov 26 — Dec 31
Tue 11/26
Tue 12/3
1 adult, Economy
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Cheap flight deals from Dulles Intl to Illinois

Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Illinois (USIL). 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 Dulles Intl to Illinois

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

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.
Sun 12/155:57 pmIAD - ORD
1 stop16h 57mFrontier
Wed 12/186:55 amORD - IAD
1 stop8h 33mFrontier
Deal found 11/20$148
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.
Wed 12/183:25 pmIAD - MDW
1 stop6h 52mFrontier
Wed 12/258:25 amMDW - IAD
1 stop5h 00mFrontier
Deal found 11/20$148
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.
Fri 12/1310:16 pmIAD - ORD
Nonstop2h 04mUnited Airlines
Tue 12/171:19 pmORD - IAD
Nonstop1h 54mUnited Airlines
Deal found 11/20$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 12/115:14 pmIAD - ORD
1 stop5h 42mDelta
Wed 12/1810:45 amORD - IAD
1 stop4h 59mDelta
Deal found 11/21$216
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 12/116:07 amIAD - MDW
1 stop8h 24mDelta
Wed 12/189:30 amMDW - IAD
1 stop6h 18mDelta
Deal found 11/20$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.
Fri 12/67:19 pmIAD - STL
1 stop28h 27mFrontier
Sun 12/85:02 pmSTL - IAD
1 stop22h 54mFrontier
Deal found 11/20$228
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 12/106:00 amIAD - STL
1 stop4h 22mDelta
Wed 12/116:00 amSTL - IAD
1 stop4h 50mDelta
Deal found 11/19$248
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.
Tue 12/108:20 amIAD - STL
1 stop7h 05mUnited Airlines
Thu 12/198:25 amSTL - IAD
Nonstop2h 18mUnited Airlines
Deal found 11/19$252
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 12/125:00 amIAD - ORD
1 stop4h 45mAmerican Airlines
Sat 12/1412:25 pmORD - IAD
1 stop6h 03mAmerican Airlines
Deal found 11/20$256
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.
Thu 12/512:44 pmIAD - MLI
1 stop4h 42mDelta
Mon 12/95:02 pmMLI - IAD
1 stop5h 54mDelta
Deal found 11/20$258
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.
Fri 12/135:00 amIAD - STL
1 stop4h 54mAmerican Airlines
Mon 12/166:02 pmSTL - IAD
1 stop4h 53mAmerican Airlines
Deal found 11/19$296
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/1712:55 pmIAD - ORD
3 stops12h 39mMultiple Airlines
Wed 12/188:14 pmORD - IAD
2 stops23h 21mMultiple Airlines
Deal found 11/20$297

Find flights from Dulles Intl to Illinois within your budget

Customize your flight search to find flights from Dulles Intl to Illinois 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 2,629,791 searches. Data last updated November 21, 2024.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Sun 12/15

5:57 pm-9:54 am

1 stop16h 57m

Chicago O'Hare Intl

Wed 12/18

6:55 am-4:28 pm

1 stop8h 33m

$148

Washington, D.C.Chicago

IAD - MDW

IADMDW

Washington, D.C. Dulles Intl

Wed 12/18

3:25 pm-9:17 pm

1 stop6h 52m

Chicago Midway

Wed 12/25

8:25 am-2:25 pm

1 stop5h 00m

$148

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Fri 12/13

10:16 pm-11:20 pm

Nonstop2h 04m

Chicago O'Hare Intl

Tue 12/17

1:19 pm-4:13 pm

Nonstop1h 54m

$197

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Wed 12/11

5:14 pm-9:56 pm

1 stop5h 42m

Chicago O'Hare Intl

Wed 12/18

10:45 am-4:44 pm

1 stop4h 59m

$216

Washington, D.C.Chicago

IAD - MDW

IADMDW

Washington, D.C. Dulles Intl

Tue 1/14

6:00 am-8:54 am

1 stop3h 54m

Chicago Midway

Wed 1/15

9:34 am-3:53 pm

1 stop5h 19m

$216

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Wed 2/26

6:03 pm-11:43 pm

1 stop6h 40m

Lambert-St Louis

Thu 2/27

5:20 pm-5:13 pm

1 stop22h 53m

$216

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Sat 1/4

6:50 pm-8:23 pm

Nonstop2h 33m

Lambert-St Louis

Sat 1/11

8:15 am-11:33 am

Nonstop2h 18m

$229

Washington, D.C.Moline

IAD - MLI

IADMLI

Washington, D.C. Dulles Intl

Thu 1/16

6:10 am-2:56 pm

1 stop9h 46m

Moline Quad-City

Fri 1/24

6:31 am-4:14 pm

1 stop8h 43m

$248

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Tue 12/10

6:00 am-9:22 am

1 stop4h 22m

Lambert-St Louis

Wed 12/11

6:00 am-11:50 am

1 stop4h 50m

$248

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Thu 12/12

5:00 am-8:45 am

1 stop4h 45m

Chicago O'Hare Intl

Sat 12/14

12:25 pm-7:28 pm

1 stop6h 03m

$256

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/21

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Best time to book a flight from Dulles Intl to Illinois

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

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

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

Currently, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Illinois (average of $232). Flying from Washington, D.C. Dulles Intl Airport to Illinois in June is currently the most expensive (average of $308). 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 IAD to IL?

Find hourly flight availability from Dulles Intl to Illinois. 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.

When flying from Washington, D.C. Dulles Intl Airport to Illinois, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Weekly flight availability from Washington, D.C. Dulles Intl Airport to Illinois

Explore weekly flight availability from Dulles Intl to Illinois. 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 November 21, 2024.

The most flights from IAD to USIL are scheduled on a Tuesday (23 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (3 on average).

Rainfall in Illinois by month

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

In terms of precipitation, rainfall in Illinois ranges from 1.7 - 4.9 inches per month. August is typically the wettest month, when rainfall can reach 4.9 in. January is typically the driest time to visit Illinois when rainfall is around 1.7 in.

Temperature in Illinois by month

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

If weather is an important factor for your trip to Illinois, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 23.0 F).

Reviews of airlines servicing Illinois

Get insights into the airlines that provide service to Illinois. 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 Illinois. Reviews last updated November 21, 2024.
Peruse reviews from past customers who have flown with Frontier, United Airlines and Delta from Washington, D.C. to Illinois to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
5,015 reviews

Comfort

8.1

Crew

8.7

Food

7.2

Boarding

8.2

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

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

Southwest
8.1
Very good
5,015 reviews
Southwest
8.1
Very good
5,015 reviews

Comfort

8.1

Crew

8.7

Food

7.2

Boarding

8.2

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

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

Delta
8.0
Very good
8,758 reviews
Southwest
8.1
Very good
5,015 reviews

Comfort

8.1

Crew

8.7

Food

7.2

Boarding

8.2

Entertainment

7.7

Overall

8.1

Reviews

1 / 10

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

Porter Airlines
7.8
Good
286 reviews
Southwest
8.1
Very good
5,015 reviews

Comfort

8.1

Crew

8.7

Food

7.2

Boarding

8.2

Entertainment

7.7

Overall

8.1

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
5,015 reviews

Comfort

8.1

Crew

8.7

Food

7.2

Boarding

8.2

Entertainment

7.7

Overall

8.1

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
5,015 reviews

Comfort

8.1

Crew

8.7

Food

7.2

Boarding

8.2

Entertainment

7.7

Overall

8.1

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 Dulles Intl to Illinois. 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 Washington, D.C. Dulles Intl Airport to Illinois one-way?

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $68. Users have also found prices from $99 and $108 on United Airlines and Delta, respectively.

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

    The most popular route from Washington, D.C. Dulles Intl Airport to Illinois is Washington, D.C. Dulles Intl - Chicago O'Hare Intl. You may also consider Washington, D.C. Dulles Intl - Chicago Midway or Washington, D.C. Dulles Intl - Lambert-St Louis.

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

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Washington, D.C. Dulles Intl Airport to Illinois on time: Egyptair (100%), ANA (93%), Ethiopian Air (92%).

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

    Looking for the cheapest flight from Washington, D.C. Dulles Intl Airport to Illinois? While on average our users pay $906, our data indicates the cheapest price to be $88. The most popular route (Washington, D.C. Dulles Intl - Chicago O'Hare Intl), is priced around $197.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Dulles Intl to Illinois 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 Washington, D.C. Dulles Intl Airport to Illinois?

    Currently, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Illinois (average of $232). Flying from Washington, D.C. Dulles Intl Airport to Illinois in June is currently the most expensive (average of $308). 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 Dulles Intl to Illinois

See prices for flight routes from nearby airports that may be better suited for you.
Baltimore to Fort Lauderdale flights
Dulles Intl to Dallas/Fort Worth flights
Reagan-National to Miami flights
Baltimore to Dallas/Fort Worth flights
Reagan-National to Orlando flights
Baltimore to Miami flights
Dulles Intl to Los Angeles flights
Dulles Intl to Las Vegas flights
Reagan-National to Los Angeles flights
Dulles Intl to Orlando flights
Baltimore to Hobby flights
Baltimore to Orlando flights
Baltimore to Las Vegas flights
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Reagan-National to Dallas/Fort Worth flights
Dulles Intl to Fort Lauderdale flights
Dulles Intl to Atlanta flights
Reagan-National to Hobby flights
Dulles Intl to Seattle flights
Dulles Intl to New Orleans flights
Reagan-National to Las Vegas flights
Baltimore to Denver flights
Reagan-National to O'Hare Intl flights
Reagan-National to Boston flights
Baltimore to New Orleans flights
Reagan-National to Fort Lauderdale flights
Reagan-National to Denver flights
Reagan-National to Atlanta flights
Baltimore to Tampa flights
Reagan-National to San Francisco flights
Baltimore to O'Hare Intl flights
Dulles Intl to Denver flights
Dulles Intl to O'Hare Intl flights
Dulles Intl to Tampa flights
Reagan-National to Seattle flights
Dulles Intl to San Francisco flights
Baltimore to George Bush Intcntl flights
Dulles Intl to Salt Lake City flights
Dulles Intl to Honolulu flights
Dulles Intl to George Bush Intcntl flights
Dulles Intl to Sky Harbor Intl flights
Baltimore to San Francisco flights
Reagan-National to Tampa flights
Dulles Intl to Hobby flights
Reagan-National to New Orleans flights
Baltimore to Boston flights
Dulles Intl to John F Kennedy Intl flights
Reagan-National to Salt Lake City flights
Dulles Intl to San Diego flights

Top 4 airlines flying from Dulles Intl to Illinois

Discover the top 4 airlines that operate flights from Dulles Intl to Illinois. 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 2,629,791 searches. Data last updated November 21, 2024.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$63Average$101FlexibilityNo cancel feeOn-time62%
DeltaCheapest$175Average$305FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$184Average$404FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$223Average$450FlexibilityNo cancel feeOn-time71%
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