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 $88. Users have also found prices from $88 and $90 on Allegiant Air 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 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 $1,594, our data indicates the cheapest price to be $114. The most popular route (Washington, D.C. Dulles Intl - Chicago O'Hare Intl), is priced around $157.

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: Air China (89%), Egyptair (89%), Ethiopian Air (84%).

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 77% by booking at least 49 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 $259.

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 $252. You can even find prices in September for less than $252, as users have found deals to Illinois from as low as $68. 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 8%.

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.

$88+ 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	$169 (United Airlines)
One-way from	$88 (Kiwi.com)
Popular in	April
Cheapest in	September
Average price	$267
Good round-trip deal	$299 or less
Good one-way deal	$149 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. 6% potential increase in price ($17 potential increase over avg. RT price).

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Cheapest flight prices on average. 0% potential price decrease ($2 potential savings vs. average RT price).

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Average for round-trip flights in June 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 June 12, 2025.

Thu 8/285:10 pmIAD - ORD

Nonstop2h 15mUnited Airlines

Sun 8/3110:43 amORD - IAD

Nonstop2h 06mUnited Airlines

Deal found 6/12

$168

Tue 6/176:10 amIAD - MDW

1 stop5h 31mFrontier

Wed 6/1811:39 amMDW - IAD

1 stop11h 25mFrontier

Deal found 6/10

$186

Wed 8/136:00 amIAD - ORD

1 stop5h 20mDelta

Tue 8/197:15 amORD - IAD

1 stop3h 17mDelta

Deal found 6/10

$197

Wed 8/136:00 amIAD - MDW

1 stop3h 35mDelta

Mon 8/1812:43 pmMDW - IAD

1 stop4h 52mDelta

Deal found 6/10

$197

Sat 7/126:27 amIAD - ORD

1 stop7h 49mAmerican Airlines

Sat 7/124:59 pmORD - IAD

1 stop5h 59mAmerican Airlines

Deal found 6/11

$198

Thu 9/46:00 amIAD - ORD

1 stop5h 26mFrontier

Mon 9/810:25 amORD - IAD

1 stop4h 48mFrontier

Deal found 6/9

$206

Sat 9/276:10 amIAD - STL

1 stop4h 25mDelta

Mon 9/295:40 pmSTL - IAD

1 stop5h 27mDelta

Deal found 6/11

$208

Wed 7/306:35 amIAD - STL

1 stop6h 52mUnited Airlines

Wed 8/66:33 amSTL - IAD

1 stop4h 22mUnited Airlines

Deal found 6/10

$213

Sat 7/266:10 amIAD - STL

1 stop8h 49mFrontier

Sat 8/22:52 pmSTL - IAD

1 stop7h 27mFrontier

Deal found 6/11

$221

Sun 8/39:05 pmIAD - ORD

2 stops25h 25mMultiple Airlines

Fri 8/84:37 pmORD - IAD

1 stop20h 35mMultiple Airlines

Deal found 6/11

$237

Mon 7/1412:46 pmIAD - ORD

1 stop5h 35mSun Country Air

Mon 7/286:15 pmORD - IAD

1 stop16h 22mSun Country Air

Deal found 6/10

$245

Wed 8/275:25 pmIAD - MLI

1 stop6h 23mDelta

Thu 9/46:00 amMLI - IAD

1 stop7h 31mDelta

Deal found 6/11

$249

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 June 12, 2025.

Thu 8/76:35 amIAD - ORD

Nonstop2h 14mUnited Airlines

Sat 8/99:31 pmORD - IAD

Nonstop1h 59mUnited Airlines

Deal found 6/11

$169

Tue 6/176:10 amIAD - MDW

1 stop5h 31mFrontier

Wed 6/1811:39 amMDW - IAD

1 stop11h 25mFrontier

Deal found 6/10

$186

Wed 8/136:00 amIAD - ORD

1 stop5h 20mDelta

Tue 8/197:15 amORD - IAD

1 stop3h 17mDelta

Deal found 6/10

$197

Sat 7/126:27 amIAD - ORD

1 stop7h 49mAmerican Airlines

Sat 7/124:59 pmORD - IAD

1 stop5h 59mAmerican Airlines

Deal found 6/11

$198

Sun 8/39:05 pmIAD - ORD

2 stops25h 25mMultiple Airlines

Fri 8/84:37 pmORD - IAD

1 stop20h 35mMultiple Airlines

Deal found 6/11

$237

Mon 7/1412:46 pmIAD - ORD

1 stop24h 42mSun Country Air

Thu 7/176:15 pmORD - IAD

1 stop17h 14mSun Country Air

Deal found 6/12

$245

Sun 6/293:58 pmIAD - MDW

1 stop16h 17mAllegiant Air

Fri 7/49:12 amMDW - IAD

1 stop27h 43mAllegiant Air

Deal found 6/10

$251

Wed 7/307:25 amIAD - STL

2 stops12h 30mSouthwest

Wed 8/66:20 amSTL - IAD

1 stop8h 55mSouthwest

Deal found 6/10

$303

Wed 8/139:50 amIAD - MDW

1 stop3h 38mDelta

Tue 8/199:31 amMDW - IAD

1 stop6h 00mDelta

Deal found 6/10

$197

Thu 9/46:00 amIAD - ORD

1 stop5h 26mFrontier

Mon 9/810:25 amORD - IAD

1 stop4h 48mFrontier

Deal found 6/9

$206

Wed 7/306:35 amIAD - STL

1 stop6h 52mUnited Airlines

Wed 8/66:33 amSTL - IAD

1 stop4h 22mUnited Airlines

Deal found 6/10

$213

Sat 7/266:10 amIAD - STL

1 stop8h 49mFrontier

Sat 8/22:52 pmSTL - IAD

1 stop7h 27mFrontier

Deal found 6/11

$221

Last-minute flights from Dulles Intl to Illinois
Discover last-minute flight deals from Dulles Intl to Illinois. Data last updated June 12, 2025 and is based on user searches.

Tue 6/176:10 amIAD - MDW

1 stop5h 31mFrontier

Wed 6/1811:39 amMDW - IAD

1 stop11h 25mFrontier

Deal found 6/10

$186

Tue 6/176:48 amIAD - MLI

1 stop4h 32mUnited Airlines

Sat 6/216:30 amMLI - IAD

1 stop4h 25mUnited Airlines

Deal found 6/10

$379

Wed 6/186:10 amIAD - ORD

1 stop11h 24mFrontier

Sat 6/215:01 amORD - IAD

1 stop9h 15mFrontier

Deal found 6/9

$260

Thu 6/195:41 pmIAD - MLI

1 stop5h 28mAmerican Airlines

Sat 6/215:02 amMLI - IAD

1 stop4h 46mAmerican Airlines

Deal found 6/11

$309

Thu 6/1910:18 pmIAD - ORD

Nonstop2h 12mUnited Airlines

Tue 7/158:52 amORD - IAD

Nonstop2h 03mUnited Airlines

Deal found 6/10

$379

Thu 6/195:41 pmIAD - PIA

1 stop7h 18mAmerican Airlines

Mon 6/234:06 pmPIA - IAD

1 stop6h 53mAmerican Airlines

Deal found 6/10

$389

Fri 6/203:31 pmIAD - STL

1 stop7h 03mDelta

Tue 7/110:48 amSTL - IAD

1 stop4h 45mDelta

Deal found 6/11

$409

Sat 6/211:29 pmIAD - STL

1 stop11h 24mFrontier

Sun 6/228:44 pmSTL - IAD

1 stop12h 25mFrontier

Deal found 6/10

$282

Sat 6/215:46 pmIAD - MLI

1 stop6h 03mDelta

Tue 6/245:27 pmMLI - IAD

1 stop4h 47mDelta

Deal found 6/10

$319

Sat 6/218:40 amIAD - STL

Nonstop2h 16mUnited Airlines

Tue 6/248:15 amSTL - IAD

Nonstop2h 08mUnited Airlines

Deal found 6/9

$449

Sun 6/223:58 pmIAD - MDW

1 stop16h 17mAllegiant Air

Sun 7/611:37 amMDW - IAD

2 stops25h 46mAllegiant Air

Deal found 6/10

$345

Sun 6/2211:12 amIAD - ORD

2 stops32h 32mMultiple Airlines

Sun 6/295:15 amORD - IAD

2 stops32h 08mMultiple Airlines

Deal found 6/11

$365

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 June 12, 2025.

Sat 10/1812:54 pmIAD - ORD

1 stop8h 30mFrontier

Deal found 6/11

$88

Sun 7/203:53 pmIAD - MDW

1 stop16h 20mAllegiant Air

Deal found 6/11

$88

Thu 8/214:56 pmIAD - ORD

1 stop24h 52mMultiple Airlines

Deal found 6/10

$89

Tue 6/176:10 amIAD - MDW

1 stop5h 31mFrontier

Deal found 6/9

$89

Tue 7/16:35 amIAD - ORD

Nonstop2h 14mUnited Airlines

Deal found 6/10

$90

Tue 10/146:00 amIAD - ORD

1 stop7h 08mDelta

Deal found 6/10

$99

Wed 8/209:50 amIAD - MDW

1 stop3h 38mDelta

Deal found 6/11

$99

Wed 8/138:40 amIAD - STL

Nonstop2h 19mUnited Airlines

Deal found 6/10

$115

Sat 7/1212:40 pmIAD - ORD

1 stop9h 24mSun Country Air

Deal found 6/10

$120

Sat 8/96:34 amIAD - STL

1 stop6h 37mAmerican Airlines

Deal found 6/11

$126

Thu 8/1411:04 amIAD - STL

2 stops21h 45mMultiple Airlines

Deal found 6/10

$129

Tue 9/95:45 amIAD - STL

2 stops13h 05mSouthwest

Deal found 6/10

$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 - ORD

IADORD

Washington, D.C. Dulles Intl

Thu 8/28

5:10 pm-6:25 pm

Nonstop2h 15m

Chicago O'Hare Intl

Sun 8/31

10:43 am-1:49 pm

Nonstop2h 06m

$168

Washington, D.C.Chicago

IAD - MDW

IADMDW

Washington, D.C. Dulles Intl

Wed 8/27

9:30 am-2:01 pm

1 stop5h 31m

Chicago Midway

Sat 8/30

10:51 am-8:48 pm

1 stop8h 57m

$186

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Wed 8/13

6:00 am-10:20 am

1 stop5h 20m

Chicago O'Hare Intl

Tue 8/19

7:15 am-11:32 am

1 stop3h 17m

$197

Washington, D.C.Chicago

IAD - MDW

IADMDW

Washington, D.C. Dulles Intl

Wed 8/13

9:50 am-12:28 pm

1 stop3h 38m

Chicago Midway

Tue 8/19

9:31 am-4:31 pm

1 stop6h 00m

$197

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Sat 7/12

6:27 am-1:16 pm

1 stop7h 49m

Chicago O'Hare Intl

Sat 7/12

4:59 pm-11:58 pm

1 stop5h 59m

$198

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Thu 9/4

6:00 am-10:26 am

1 stop5h 26m

Chicago O'Hare Intl

Mon 9/8

10:25 am-4:13 pm

1 stop4h 48m

$206

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Sat 9/27

6:10 am-9:35 am

1 stop4h 25m

Lambert-St Louis

Mon 9/29

5:40 pm-12:07 am

1 stop5h 27m

$208

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Wed 7/30

6:35 am-12:27 pm

1 stop6h 52m

Lambert-St Louis

Wed 8/6

6:33 am-11:55 am

1 stop4h 22m

$213

Washington, D.C.St. Louis

IAD - STL

IADSTL

Washington, D.C. Dulles Intl

Sat 7/26

6:10 am-1:59 pm

1 stop8h 49m

Lambert-St Louis

Sat 8/2

2:52 pm-11:19 pm

1 stop7h 27m

$221

Washington, D.C.Chicago

IAD - ORD

IADORD

Washington, D.C. Dulles Intl

Sun 8/3

9:05 pm-9:30 pm

2 stops25h 25m

Chicago O'Hare Intl

Fri 8/8

4:37 pm-2:12 pm

1 stop20h 35m

$237

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 56 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 (23 on average).

Rainfall in Illinois 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

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

Peruse reviews from past customers who have flown with Southwest, Delta and United Airlines 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

8.0

Very good

4,287 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Southwest

8.0

Very good

4,287 reviews

Southwest

8.0

Very good

4,287 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Delta

8.0

Very good

7,946 reviews

Southwest

8.0

Very good

4,287 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

United Airlines

7.4

Good

8,790 reviews

Southwest

8.0

Very good

4,287 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

Allegiant Air

7.3

Good

725 reviews

Southwest

8.0

Very good

4,287 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

American Airlines

7.2

Good

10,000 reviews

Southwest

8.0

Very good

4,287 reviews

Reviews

1 / 20

8.0

Excellent

John,May 2025

PVD - BNA

It’s southwest so no frills but clean, efficient and got me to my location.

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 $88. Users have also found prices from $88 and $90 on Allegiant Air 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: Air China (89%), Egyptair (89%), Ethiopian Air (84%).
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 $1,594, our data indicates the cheapest price to be $114. The most popular route (Washington, D.C. Dulles Intl - Chicago O'Hare Intl), is priced around $157.
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$87	Average$142	FlexibilityNo cancel fee	On-time62%
United Airlines	Cheapest$161	Average$417	FlexibilityNo cancel fee	On-time69%
Delta	Cheapest$176	Average$260	FlexibilityNo cancel fee	On-timeN/A
American Airlines	Cheapest$328	Average$407	FlexibilityNo cancel fee	On-time71%

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$88+ 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 10/18. 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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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 June 12, 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 June 12, 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 June 12, 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 June 12, 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 June 12, 2025.

Rainfall in Illinois by month

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

Temperature in Illinois by month

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

Reviews of airlines servicing Illinois

Peruse reviews from past customers who have flown with Southwest, Delta and United Airlines 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.

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?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 June 12, 2025.