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 $83. Users have also found prices from $100 and $119 on Delta and United Airlines, respectively.

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.

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).

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 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 $1,867, our data indicates the cheapest price to be $133. The most popular route (Washington, D.C. Dulles Intl - Chicago O'Hare Intl), is priced around $217.

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 (84%), Ethiopian Air (77%), Air Canada (74%).

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

Consider American Airlines, Delta or Frontier when booking your flight. These represent the most popular airlines when flying from Washington, D.C. Dulles Intl Airport to Illinois.

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

Find a great deal and save up to 76% by booking at least 51 days prior to your desired departure date, rather than waiting until the week of travel. According to our data, there are a number of flights available from Washington, D.C. Dulles Intl Airport to Illinois within the next two weeks, with the cheapest ticket starting at $265.

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

The best pricing can be found in the month of September. Prices to Illinois from Washington, D.C. Dulles Intl Airport average $250. You can even find prices in September for less than $250, as users have found deals to Illinois from as low as $70. The month of April appears to be one of the more expensive times to travel to Illinois from Washington, D.C. Dulles Intl Airport. Flying in the targeted month can save you up to 9%.

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.

$83+ Flights from Washington, D.C. Dulles Intl Airport to Illinois

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Cheap flight deals from Dulles Intl to Illinois

Round-trip from	$166 (Cheapflightsfares)
One-way from	$83 (Cheapflightsfares)
Popular in	April
Cheapest in	September
Average price	$266
Good round-trip deal	$335 or less
Good one-way deal	$222 or less

From Washington, D.C. Dulles Intl to Illinois

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One-way flight from Washington, D.C. Dulles Intl to Illinois

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Highest demand for flights based on searches. 7% potential increase in price ($19 potential increase over avg. RT price).

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Cheapest flight prices on average. 0% potential price decrease ($3 potential savings vs. average RT price).

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Average for round-trip flights in July 2025

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Price to beat on a round-trip flight from Washington, D.C. Dulles Intl to Illinois.

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Price to beat on a one-way flight from Washington, D.C. Dulles Intl to Illinois.

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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 July 29, 2025.

Wed 9/39:30 amIAD - MDW

1 stop5h 31mFrontier

Sat 9/610:51 amMDW - IAD

1 stop6h 33mFrontier

Deal found 7/29

$166

Wed 7/306:10 amIAD - ORD

1 stop5h 15mFrontier

Wed 8/65:34 pmORD - IAD

1 stop5h 45mFrontier

Deal found 7/27

$195

Sat 8/166:10 amIAD - STL

1 stop8h 49mFrontier

Sat 8/303:02 pmSTL - IAD

1 stop6h 58mFrontier

Deal found 7/28

$198

Sat 10/410:10 pmIAD - ORD

Nonstop2h 05mUnited Airlines

Sat 10/115:55 pmORD - IAD

Nonstop2h 00mUnited Airlines

Deal found 7/28

$217

Sat 8/305:25 pmIAD - MLI

1 stop6h 23mDelta

Tue 9/24:59 pmMLI - IAD

1 stop5h 22mDelta

Deal found 7/28

$224

Sat 8/236:35 amIAD - STL

1 stop6h 50mUnited Airlines

Wed 9/38:15 amSTL - IAD

Nonstop2h 10mUnited Airlines

Deal found 7/28

$227

Sat 8/301:18 pmIAD - MLI

2 stops9h 33mAmerican Airlines

Fri 9/58:19 amMLI - IAD

1 stop4h 32mAmerican Airlines

Deal found 7/28

$230

Sat 8/2312:39 pmIAD - STL

1 stop7h 28mDelta

Wed 9/310:45 amSTL - IAD

1 stop5h 49mDelta

Deal found 7/28

$237

Tue 8/262:15 pmIAD - ORD

1 stop8h 20mDelta

Wed 8/275:45 amORD - IAD

1 stop4h 38mDelta

Deal found 7/29

$237

Tue 8/199:50 amIAD - MDW

1 stop3h 38mDelta

Sat 8/236:04 amMDW - IAD

1 stop4h 19mDelta

Deal found 7/29

$237

Wed 10/226:50 pmIAD - PIA

1 stop4h 25mUnited Airlines

Sat 10/258:10 amPIA - IAD

1 stop4h 41mUnited Airlines

Deal found 7/28

$249

Sat 8/301:18 pmIAD - ORD

1 stop6h 50mAmerican Airlines

Sun 8/317:13 amORD - IAD

1 stop4h 35mAmerican Airlines

Deal found 7/27

$258

Best flights from Dulles Intl to Illinois
Discover carefully curated flight deals from Dulles Intl to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 29, 2025.

Wed 9/39:30 amIAD - MDW

1 stop5h 31mFrontier

Sat 9/610:51 amMDW - IAD

1 stop6h 33mFrontier

Deal found 7/29

$166

Sat 10/410:10 pmIAD - ORD

Nonstop2h 05mUnited Airlines

Sat 10/115:55 pmORD - IAD

Nonstop2h 00mUnited Airlines

Deal found 7/28

$217

Sat 8/305:25 pmIAD - MLI

1 stop6h 23mDelta

Tue 9/24:59 pmMLI - IAD

1 stop5h 22mDelta

Deal found 7/28

$224

Sat 8/301:18 pmIAD - MLI

2 stops9h 33mAmerican Airlines

Fri 9/58:19 amMLI - IAD

1 stop4h 32mAmerican Airlines

Deal found 7/28

$230

Thu 8/214:56 pmIAD - ORD

2 stops17h 25mMultiple Airlines

Sun 8/245:16 pmORD - IAD

2 stops21h 07mMultiple Airlines

Deal found 7/28

$264

Sun 8/2412:06 pmIAD - ORD

1 stop22h 08mSun Country Air

Thu 8/283:37 pmORD - IAD

1 stop19h 56mSun Country Air

Deal found 7/27

$272

Sun 8/179:12 pmIAD - MDW

2 stops17h 52mAllegiant Air

Fri 8/229:32 amMDW - IAD

1 stop4h 51mAllegiant Air

Deal found 7/28

$292

Wed 9/39:30 amIAD - ORD

1 stop6h 04mFrontier

Sat 9/65:40 pmORD - IAD

1 stop5h 15mFrontier

Deal found 7/29

$186

Sat 8/166:10 amIAD - STL

1 stop8h 49mFrontier

Sat 8/303:02 pmSTL - IAD

1 stop6h 58mFrontier

Deal found 7/28

$198

Sat 8/236:35 amIAD - STL

1 stop6h 50mUnited Airlines

Wed 9/38:15 amSTL - IAD

Nonstop2h 10mUnited Airlines

Deal found 7/28

$227

Sat 8/2312:39 pmIAD - STL

1 stop7h 28mDelta

Wed 9/310:45 amSTL - IAD

1 stop5h 49mDelta

Deal found 7/28

$237

Sat 8/301:18 pmIAD - ORD

1 stop6h 50mAmerican Airlines

Sun 8/317:13 amORD - IAD

1 stop4h 35mAmerican Airlines

Deal found 7/27

$258

Last-minute flights from Dulles Intl to Illinois
Discover last-minute flight deals from Dulles Intl to Illinois. Data last updated July 29, 2025 and is based on user searches.

Wed 7/306:10 amIAD - ORD

1 stop5h 15mFrontier

Wed 8/65:34 pmORD - IAD

1 stop5h 45mFrontier

Deal found 7/27

$195

Sun 8/36:10 amIAD - STL

1 stop8h 24mFrontier

Sat 8/162:52 pmSTL - IAD

1 stop7h 34mFrontier

Deal found 7/28

$208

Sun 8/36:35 amIAD - MLI

1 stop4h 47mUnited Airlines

Wed 8/135:20 pmMLI - IAD

1 stop6h 10mUnited Airlines

Deal found 7/28

$299

Sun 8/36:35 amIAD - PIA

1 stop4h 44mUnited Airlines

Wed 8/136:45 amPIA - IAD

1 stop4h 10mUnited Airlines

Deal found 7/28

$369

Mon 8/46:10 amIAD - ORD

1 stop5h 15mFrontier

Wed 8/65:34 pmORD - IAD

1 stop5h 45mFrontier

Deal found 7/27

$196

Mon 8/45:39 pmIAD - EVV

1 stop5h 10mAmerican Airlines

Mon 8/1111:54 amEVV - IAD

1 stop5h 58mAmerican Airlines

Deal found 7/27

$457

Tue 8/56:10 amIAD - MDW

1 stop5h 30mFrontier

Wed 8/611:39 amMDW - IAD

1 stop11h 40mFrontier

Deal found 7/27

$178

Tue 8/53:37 pmIAD - MLI

1 stop7h 42mDelta

Sat 8/95:26 pmMLI - IAD

1 stop4h 53mDelta

Deal found 7/27

$354

Wed 8/67:44 amIAD - ORD

1 stop7h 26mAmerican Airlines

Tue 8/1910:26 amORD - IAD

1 stop7h 26mAmerican Airlines

Deal found 7/27

$456

Thu 8/711:58 amIAD - ORD

2 stops13h 00mMultiple Airlines

Sat 8/95:38 pmORD - IAD

2 stops16h 30mMultiple Airlines

Deal found 7/27

$322

Thu 8/711:58 amIAD - STL

2 stops7h 43mMultiple Airlines

Sun 8/105:26 pmSTL - IAD

2 stops19h 57mMultiple Airlines

Deal found 7/28

$384

Fri 8/810:15 pmIAD - ORD

1 stop9h 05mUnited Airlines

Sat 8/98:52 amORD - IAD

Nonstop2h 03mUnited Airlines

Deal found 7/27

$309

One-way flights from Dulles Intl to Illinois
Search for one-way flight options from Dulles Intl to Illinois. Find affordable one-way fares based on user searches. Data last updated July 29, 2025.

Tue 8/56:10 amIAD - MDW

1 stop5h 30mFrontier

Deal found 7/29

$83

Wed 10/157:25 amIAD - ORD

1 stop17h 45mFrontier

Deal found 7/27

$86

Sat 8/305:25 pmIAD - MLI

1 stop6h 23mDelta

Deal found 7/28

$100

Sun 10/126:00 amIAD - STL

1 stop5h 07mFrontier

Deal found 7/28

$103

Thu 8/214:56 pmIAD - ORD

2 stops17h 25mMultiple Airlines

Deal found 7/27

$109

Wed 9/245:10 pmIAD - STL

1 stop6h 25mUnited Airlines

Deal found 7/28

$119

Tue 12/26:00 amIAD - ORD

1 stop7h 08mDelta

Deal found 7/28

$119

Tue 8/196:00 amIAD - MDW

1 stop3h 35mDelta

Deal found 7/27

$119

Sun 11/912:50 pmIAD - ORD

1 stop5h 18mSun Country Air

Deal found 7/27

$120

Thu 10/3010:35 pmIAD - ORD

Nonstop2h 08mUnited Airlines

Deal found 7/28

$126

Thu 11/2710:52 amIAD - ORD

1 stop4h 32mAmerican Airlines

Deal found 7/27

$128

Thu 8/217:10 pmIAD - PIA

1 stop14h 32mAllegiant Air

Deal found 7/27

$135

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Illinois that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.Chicago

IAD - MDW

IADMDW

Washington, D.C. Dulles Intl

Wed 9/3

9:30 am-2:01 pm

1 stop5h 31m

Chicago Midway

Sat 9/6

10:51 am-6:24 pm

1 stop6h 33m

$166

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Wed 9/3

9:30 am-2:34 pm

1 stop6h 04m

Chicago O'Hare Intl

Sat 9/6

5:40 pm-11:55 pm

1 stop5h 15m

$186

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Sat 8/16

6:10 am-1:59 pm

1 stop8h 49m

Lambert-St Louis

Sat 8/30

3:02 pm-11:00 pm

1 stop6h 58m

$198

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Sat 10/4

10:10 pm-11:15 pm

Nonstop2h 05m

Chicago O'Hare Intl

Sat 10/11

5:55 pm-8:55 pm

Nonstop2h 00m

$217

Washington, D.C.Moline

IAD - MLI

IADMLI

Washington, D.C. Dulles Intl

Sat 8/30

5:25 pm-10:48 pm

1 stop6h 23m

Moline Quad-City

Tue 9/2

4:59 pm-11:21 pm

1 stop5h 22m

$224

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Sat 8/23

6:35 am-12:25 pm

1 stop6h 50m

Lambert-St Louis

Wed 9/3

8:15 am-11:25 am

Nonstop2h 10m

$227

Washington, D.C.Moline

IAD - MLI

IADMLI

Washington, D.C. Dulles Intl

Sat 8/30

1:18 pm-9:51 pm

2 stops9h 33m

Moline Quad-City

Fri 9/5

8:19 am-1:51 pm

1 stop4h 32m

$230

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Sat 8/23

12:39 pm-7:07 pm

1 stop7h 28m

Lambert-St Louis

Wed 9/3

10:45 am-5:34 pm

1 stop5h 49m

$237

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Tue 8/26

7:22 am-12:16 pm

1 stop5h 54m

Chicago O'Hare Intl

Wed 9/3

3:30 pm-11:21 pm

1 stop6h 51m

$237

Washington, D.C.Chicago

IAD - MDW

IADMDW

Washington, D.C. Dulles Intl

Tue 8/19

9:50 am-12:28 pm

1 stop3h 38m

Chicago Midway

Sat 8/23

6:04 am-11:23 am

1 stop4h 19m

$237

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 51 results

...

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.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to Illinois

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

Currently, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Illinois (average of $245). Flying from Washington, D.C. Dulles Intl Airport to Illinois in March is currently the most expensive (average of $321). 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?

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

The most flights from IAD to USIL are scheduled on a Tuesday (31 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (20 on average).

Reviews of airlines servicing Illinois

See what other customers who have flown with Southwest, Delta, and United Airlines from Washington, D.C. Dulles Intl Airport to Illinois have to say. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

8.0

Very good

4,238 reviews

Reviews

1 / 20

8.0

Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

Southwest

8.0

Very good

4,238 reviews

Southwest

8.0

Very good

4,238 reviews

Reviews

1 / 20

8.0

Excellent

Gina,Jul 2025

LAS - DEN

Delta

8.0

Very good

7,979 reviews

Southwest

8.0

Very good

4,238 reviews

Reviews

1 / 20

8.0

Excellent

Gina,Jul 2025

LAS - DEN

United Airlines

7.4

Good

8,896 reviews

Southwest

8.0

Very good

4,238 reviews

Reviews

1 / 20

8.0

Excellent

Gina,Jul 2025

LAS - DEN

American Airlines

7.2

Good

10,000 reviews

Southwest

8.0

Very good

4,238 reviews

Reviews

1 / 20

8.0

Excellent

Gina,Jul 2025

LAS - DEN

Allegiant Air

7.2

Good

702 reviews

Southwest

8.0

Very good

4,238 reviews

Reviews

1 / 20

8.0

Excellent

Gina,Jul 2025

LAS - DEN

Related info for your journey

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 $83. Users have also found prices from $100 and $119 on Delta and United Airlines, 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 (84%), Ethiopian Air (77%), Air Canada (74%).
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 $1,867, our data indicates the cheapest price to be $133. The most popular route (Washington, D.C. Dulles Intl - Chicago O'Hare Intl), is priced around $217.
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, August is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Illinois (average of $245). Flying from Washington, D.C. Dulles Intl Airport to Illinois in March is currently the most expensive (average of $321). 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 4 airlines flying from Dulles Intl to Illinois

Airline	Cheapest	Average	Flexibility	On-time
Frontier	Cheapest$90	Average$192	FlexibilityNo cancel fee	On-time62%
United Airlines	Cheapest$161	Average$417	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$176	Average$385	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$303	Average$407	FlexibilityNo cancel fee	On-time71%

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$83+ 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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Dulles Intl to Illinois with Cheapflights

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3. Compare prices and book

Cheap flight deals from Dulles Intl to Illinois

Keep the following information in mind while searching for Dulles Intl to Illinois flight deals. Data was last updated July 29, 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Find flight deals from Dulles Intl to Illinois

Cheapest flights from Dulles Intl to IllinoisExplore 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 July 29, 2025.

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 July 29, 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to Illinois that are best for you.

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.

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to Illinois

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

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 July 29, 2025.

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 July 29, 2025.

Reviews of airlines servicing Illinois

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?

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

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

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

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

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

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

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

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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.

Top 4 airlines flying from Dulles Intl to Illinois

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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 July 29, 2025.