How long is the flight from District of Columbia to Illinois?

Airlines like Frontier, JetBlue, and Southwest fly from District of Columbia to Illinois in about 2h 10m. The time it takes to get you to your destination can typically vary by up to 9h 57m. District of Columbia and Illinois are separated by a distance of 599 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

What are the cheapest airlines to fly from District of Columbia to Illinois one-way?

$16 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Spirit Airlines and American Airlines, with prices starting from $45 and $78, 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).

How can I find direct flights from District of Columbia to Illinois?

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

Can I find deals for business class flights from District of Columbia to Illinois?

Yes. Cheapflights offers flight deals from District of Columbia 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.

$62+ Flights from District of Columbia to Illinois

Q: How much does it cost to fly round-trip from District of Columbia to Illinois?

Airfare is below average for this route at the moment. District of Columbia to Illinois flights typically cost between $321 and $555 in January. The cheapest round-trip price found within the last 3 days was $146 on Frontier (Jan 7-Jan 14).

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Cheap flight deals from District of Columbia to Illinois

Cheapest flights from District of Columbia to Illinois
Explore the most affordable flight options available from District of Columbia to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 16, 2025.

Wed 12/316:05 amIAD - MDW

1 stop17h 07mFrontier

Wed 1/73:01 pmMDW - IAD

1 stop21h 00mFrontier

Deal found 12/14

$191

Wed 12/316:05 amIAD - MDW

1 stop17h 07mFrontier

Fri 1/93:01 pmMDW - IAD

1 stop21h 15mFrontier

Deal found 12/14

$203

Tue 12/169:00 amIAD - ORD

1 stop10h 46mFrontier

Sat 1/108:27 pmORD - IAD

1 stop10h 13mFrontier

Deal found 12/13

$213

Wed 12/316:05 amIAD - MDW

1 stop17h 07mFrontier

Mon 1/124:31 pmMDW - IAD

2 stops18h 12mFrontier

Deal found 12/14

$213

Wed 12/316:05 amIAD - MDW

1 stop17h 07mFrontier

Sun 1/114:21 pmMDW - IAD

1 stop14h 19mFrontier

Deal found 12/14

$214

Wed 12/316:05 amIAD - MDW

1 stop17h 07mFrontier

Thu 1/812:41 pmMDW - IAD

2 stops18h 14mFrontier

Deal found 12/14

$220

Tue 12/308:15 pmIAD - MDW

2 stops19h 22mFrontier

Wed 1/73:01 pmMDW - IAD

1 stop21h 00mFrontier

Deal found 12/14

$221

Thu 12/257:01 amDCA - ORD

Nonstop2h 25mAmerican Airlines

Thu 1/16:09 amORD - DCA

Nonstop1h 49mAmerican Airlines

Deal found 12/14

$223

Wed 12/245:31 pmIAD - ORD

Nonstop2h 21mUnited Airlines

Wed 12/312:30 pmORD - IAD

Nonstop2h 00mUnited Airlines

Deal found 12/14

$223

Thu 12/258:45 pmDCA - MDW

Nonstop2h 10mSouthwest

Thu 1/13:30 pmMDW - DCA

Nonstop1h 45mSouthwest

Deal found 12/14

$223

Wed 12/319:36 amDCA - ORD

Nonstop2h 14mAmerican Airlines

Wed 1/79:45 amORD - DCA

Nonstop1h 59mAmerican Airlines

Deal found 12/14

$227

Tue 12/308:15 pmIAD - MDW

2 stops19h 22mFrontier

Fri 1/93:01 pmMDW - IAD

1 stop21h 15mFrontier

Deal found 12/14

$233

Best flights from District of Columbia to Illinois
Discover carefully curated flight deals from District of Columbia to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 16, 2025.

Thu 3/511:22 amIAD - MDW

1 stop12h 07mFrontier

Wed 3/1111:19 amMDW - IAD

1 stop19h 05mFrontier

Deal found 12/14

$162

Wed 1/71:00 pmDCA - ORD

1 stop5h 43mJetBlue

Sat 1/107:45 amORD - DCA

1 stop8h 19mJetBlue

Deal found 12/16

$197

Wed 1/146:55 pmDCA - MDW

Nonstop2h 10mSouthwest

Wed 1/2110:15 amMDW - DCA

Nonstop1h 45mSouthwest

Deal found 12/15

$231

Sat 2/146:30 amDCA - ORD

Nonstop2h 20mUnited Airlines

Sat 2/143:50 pmORD - DCA

1 stop5h 08mUnited Airlines

Deal found 12/15

$233

Tue 1/65:59 pmDCA - ORD

1 stop4h 06mDelta

Wed 1/76:50 amORD - DCA

1 stop4h 10mDelta

Deal found 12/14

$251

Fri 1/1612:44 pmDCA - PIA

1 stop4h 48mAmerican Airlines

Mon 1/195:16 pmPIA - DCA

1 stop5h 43mAmerican Airlines

Deal found 12/15

$269

Thu 1/221:00 pmDCA - ORD

1 stop5h 43mJetBlue

Mon 1/267:45 amORD - DCA

1 stop7h 34mJetBlue

Deal found 12/15

$197

Fri 1/2311:55 amDCA - ORD

1 stop6h 48mJetBlue

Mon 1/267:45 amORD - DCA

1 stop5h 44mJetBlue

Deal found 12/14

$197

Tue 1/1312:59 pmDCA - ORD

1 stop4h 57mUnited Airlines

Tue 1/2012:38 pmORD - DCA

Nonstop1h 54mUnited Airlines

Deal found 12/16

$237

Tue 1/139:30 amDCA - MDW

Nonstop2h 05mSouthwest

Tue 1/206:10 amMDW - DCA

1 stop4h 05mSouthwest

Deal found 12/15

$237

Fri 1/301:00 pmDCA - ORD

1 stop5h 43mJetBlue

Mon 2/28:29 amORD - DCA

1 stop6h 50mJetBlue

Deal found 12/14

$197

Tue 1/66:00 amIAD - ORD

1 stop4h 41mDelta

Sat 1/105:59 pmORD - IAD

1 stop4h 38mDelta

Deal found 12/14

$251

Thu 1/1511:45 amDCA - MDW

Nonstop2h 10mSouthwest

Sun 1/187:05 amMDW - DCA

Nonstop1h 55mSouthwest

Deal found 12/14

$245

Thu 2/1210:30 pmIAD - ORD

Nonstop2h 13mUnited Airlines

Sat 2/148:50 amORD - IAD

Nonstop1h 59mUnited Airlines

Deal found 12/15

$246

Thu 1/159:35 amDCA - STL

1 stop4h 28mAmerican Airlines

Sun 1/189:54 amSTL - DCA

Nonstop2h 05mAmerican Airlines

Deal found 12/16

$271

Fri 3/66:00 amDCA - ORD

1 stop6h 49mJetBlue

Mon 3/910:00 amORD - DCA

1 stop7h 55mJetBlue

Deal found 12/15

$207

Wed 1/285:26 pmIAD - ORD

1 stop4h 39mDelta

Wed 2/46:50 amORD - IAD

1 stop4h 02mDelta

Deal found 12/14

$251

Wed 12/246:00 pmDCA - ORD

Nonstop2h 17mUnited Airlines

Sun 1/1810:00 amORD - DCA

Nonstop2h 13mUnited Airlines

Deal found 12/13

$251

Tue 2/176:00 amIAD - MDW

1 stop6h 59mDelta

Sat 2/219:34 amMDW - IAD

1 stop5h 54mDelta

Deal found 12/15

$251

Tue 1/133:35 pmDCA - STL

1 stop4h 25mSouthwest

Wed 1/146:20 amSTL - DCA

2 stops8h 05mSouthwest

Deal found 12/15

$260

Wed 1/2812:32 pmIAD - MDW

1 stop6h 23mDelta

Wed 2/1110:46 amMDW - IAD

1 stop6h 35mDelta

Deal found 12/14

$251

Tue 12/236:00 amDCA - PIA

1 stop4h 30mAmerican Airlines

Mon 1/265:16 pmPIA - DCA

1 stop5h 43mAmerican Airlines

Deal found 12/16

$304

Fri 1/1612:00 pmDCA - ORD

Nonstop2h 15mUnited Airlines

Sun 1/188:00 amORD - DCA

Nonstop1h 56mUnited Airlines

Deal found 12/16

$256

Sat 1/176:30 amDCA - MDW

2 stops10h 55mSouthwest

Mon 1/193:10 pmMDW - DCA

Nonstop1h 45mSouthwest

Deal found 12/15

$261

Wed 1/286:00 amIAD - MDW

1 stop3h 52mDelta

Wed 2/46:35 pmMDW - IAD

1 stop3h 31mDelta

Deal found 12/14

$251

Fri 1/165:46 pmIAD - PIA

1 stop6h 38mAmerican Airlines

Mon 1/195:29 pmPIA - IAD

1 stop4h 43mAmerican Airlines

Deal found 12/16

$304

Wed 3/47:00 amDCA - ORD

1 stop5h 38mUnited Airlines

Sat 3/72:00 pmORD - DCA

Nonstop1h 59mUnited Airlines

Deal found 12/15

$260

Wed 1/1411:00 amDCA - STL

2 stops7h 05mSouthwest

Wed 1/216:00 amSTL - DCA

2 stops7h 15mSouthwest

Deal found 12/15

$265

Wed 1/712:09 pmIAD - MDW

1 stop5h 20mDelta

Sat 1/106:45 amMDW - IAD

1 stop7h 00mDelta

Deal found 12/15

$251

Tue 1/135:17 pmIAD - ORD

Nonstop2h 20mUnited Airlines

Fri 1/168:52 amORD - IAD

Nonstop1h 54mUnited Airlines

Deal found 12/15

$260

Last-minute flights from District of Columbia to Illinois
Discover last-minute flight deals from District of Columbia to Illinois. Data last updated December 16, 2025 and is based on user searches.

Thu 1/15:35 amIAD - MDW

1 stop17h 37mFrontier

Wed 1/73:01 pmMDW - IAD

1 stop21h 00mFrontier

Deal found 12/14

$163

Wed 1/76:00 amIAD - ORD

1 stop17h 39mFrontier

Wed 1/145:57 pmORD - IAD

1 stop16h 46mFrontier

Deal found 12/16

$146

Wed 1/75:42 pmIAD - ORD

1 stop5h 57mFrontier

Sat 1/108:27 pmORD - IAD

1 stop10h 13mFrontier

Deal found 12/15

$162

Thu 1/86:00 amIAD - ORD

1 stop6h 35mFrontier

Mon 1/125:50 amORD - IAD

1 stop8h 37mFrontier

Deal found 12/14

$151

Sun 1/111:46 pmIAD - ORD

1 stop19h 32mMultiple Airlines

Sun 1/184:41 pmORD - IAD

1 stop14h 10mMultiple Airlines

Deal found 12/14

$160

Tue 1/136:00 amIAD - ORD

1 stop11h 52mFrontier

Thu 1/154:41 pmORD - IAD

1 stop14h 10mFrontier

Deal found 12/14

$142

Tue 1/136:00 amIAD - MDW

1 stop5h 34mFrontier

Thu 1/158:19 pmMDW - IAD

1 stop15h 44mFrontier

Deal found 12/14

$160

Wed 1/146:00 amIAD - ORD

1 stop11h 52mFrontier

Sun 1/184:41 pmORD - IAD

1 stop14h 10mFrontier

Deal found 12/16

$152

Thu 1/156:00 amIAD - ORD

1 stop7h 08mMultiple Airlines

Thu 1/2212:44 pmORD - IAD

1 stop18h 56mMultiple Airlines

Deal found 12/16

$153

Thu 1/156:00 amIAD - ORD

1 stop7h 08mFrontier

Sun 1/184:41 pmORD - IAD

1 stop14h 10mFrontier

Deal found 12/14

$159

Thu 1/155:42 pmIAD - MDW

1 stop5h 37mFrontier

Thu 1/226:20 amMDW - IAD

1 stop9h 08mFrontier

Deal found 12/16

$162

Sat 1/179:33 amIAD - ORD

1 stop9h 19mMultiple Airlines

Sun 1/184:41 pmORD - IAD

1 stop14h 10mMultiple Airlines

Deal found 12/16

$156

One-way flights from District of Columbia to Illinois
Search for one-way flight options from District of Columbia to Illinois. Find affordable one-way fares based on user searches. Data last updated December 16, 2025.

Fri 1/1610:08 pmIAD - STL

1 stop9h 43mFrontier

Deal found 12/15

$62

Wed 2/118:00 amDCA - STL

1 stop8h 53mFrontier

Deal found 12/16

$63

Thu 1/86:00 amIAD - STL

1 stop9h 48mFrontier

Deal found 12/14

$64

Sat 1/248:00 amDCA - STL

1 stop7h 46mFrontier

Deal found 12/16

$64

Tue 1/2011:00 amIAD - STL

1 stop20h 51mFrontier

Deal found 12/15

$68

Tue 1/132:00 pmDCA - STL

1 stop25h 48mFrontier

Deal found 12/16

$68

Sun 1/186:00 amIAD - STL

1 stop25h 51mFrontier

Deal found 12/16

$69

Mon 2/235:22 pmIAD - ORD

1 stop24h 30mFrontier

Deal found 12/14

$69

Sat 2/711:39 amIAD - ORD

1 stop12h 05mFrontier

Deal found 12/15

$70

Sat 2/78:00 amDCA - STL

1 stop28h 18mFrontier

Deal found 12/16

$70

Wed 1/212:00 pmDCA - ORD

1 stop29h 31mFrontier

Deal found 12/16

$71

Sat 2/2811:29 amIAD - MDW

1 stop10h 49mFrontier

Deal found 12/16

$71

Find flight deals from District of Columbia to Illinois

Most accurate provider	Mytrip 3 stars
Most trusted provider	Mytrip 3 stars
Round-trip from	$146 (Kiwi.com)
One-way from	$62 (Trip.com)
Popular in	November
Cheapest in	September
Average price	$269
Good round-trip deal	$317 or less
Good one-way deal	$177 or less

Provider with most accurate pricing for Washington, D.C. (WAS)-Chicago (CHI) flight deals.

Search Deals

Provider most trusted by Cheapflights users for Washington, D.C. (WAS)-Chicago (CHI) flights.

Search Deals

From District of Columbia to Illinois

Search Deals

One-way flight from District of Columbia to Illinois

Search Deals

Highest demand for flights based on searches. 4% potential increase in price ($12 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in December 2025

Search Deals

Price to beat on a round-trip flight from District of Columbia to Illinois.

Search Deals

Price to beat on a one-way flight from District of Columbia to Illinois.

Search Deals

Cheapflights Fare Finder

Use the filters below to find and compare flights from District of Columbia 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

Thu 3/5

11:22 am-10:29 pm

1 stop12h 07m

Chicago Midway

Wed 3/11

11:19 am-7:24 am

1 stop19h 05m

$162

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Wed 1/7

1:00 pm-5:43 pm

1 stop5h 43m

Chicago O'Hare Intl

Sat 1/10

7:45 am-5:04 pm

1 stop8h 19m

$197

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Thu 1/22

1:00 pm-5:43 pm

1 stop5h 43m

Chicago O'Hare Intl

Mon 1/26

7:45 am-4:19 pm

1 stop7h 34m

$197

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Fri 1/23

11:55 am-5:43 pm

1 stop6h 48m

Chicago O'Hare Intl

Mon 1/26

7:45 am-2:29 pm

1 stop5h 44m

$197

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Fri 1/30

1:00 pm-5:43 pm

1 stop5h 43m

Chicago O'Hare Intl

Mon 2/2

8:29 am-4:19 pm

1 stop6h 50m

$197

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Fri 3/6

6:00 am-11:49 am

1 stop6h 49m

Chicago O'Hare Intl

Mon 3/9

10:00 am-6:55 pm

1 stop7h 55m

$207

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Wed 1/14

6:55 pm-8:05 pm

Nonstop2h 10m

Chicago Midway

Wed 1/21

10:15 am-1:00 pm

Nonstop1h 45m

$231

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Sat 2/14

6:30 am-7:50 am

Nonstop2h 20m

Chicago O'Hare Intl

Sat 2/14

3:50 pm-9:58 pm

1 stop5h 08m

$233

Washington, D.C.Chicago

DCA - ORD

DCAORD

Washington, D.C. Reagan-National

Tue 1/13

12:59 pm-4:56 pm

1 stop4h 57m

Chicago O'Hare Intl

Tue 1/20

12:38 pm-3:32 pm

Nonstop1h 54m

$237

Washington, D.C.Chicago

DCA - MDW

DCAMDW

Washington, D.C. Reagan-National

Tue 1/13

9:30 am-10:35 am

Nonstop2h 05m

Chicago Midway

Tue 1/20

6:10 am-11:15 am

1 stop4h 05m

$237

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 60 results

...

Best time to book a flight from District of Columbia to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from District of Columbia 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 District of Columbia to Illinois

What is the cheapest month to book a flight from District of Columbia to Illinois?

Currently, March is the cheapest month in which you can book a flight from District of Columbia to Illinois (average of $49). Flying from District of Columbia to Illinois in June is currently the most expensive (average of $133). 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 DC to IL?

When flying from District of Columbia to Illinois, the time of day you fly usually plays a role in the price. Save by searching for a flight in the evening, which can drop the price by up to 33% versus a flight at noon.

What is the cheapest day to fly from District of Columbia to Illinois?

Travelers seeking maximum savings on their District of Columbia to Illinois flight should consider departing on Saturday evenings when fares are most often at their lowest. Monday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

How much does it cost to fly round-trip from District of Columbia to Illinois?

Reviews of airlines servicing Illinois

See what other customers who have flown with Southwest, United Airlines, and American Airlines from District of Columbia to Illinois have to say. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Southwest

7.9

Good

4,250 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

United Airlines

7.4

Good

9,092 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

American Airlines

7.2

Good

11,049 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Spirit Airlines

6.3

Okay

8,186 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Frontier

5.8

Fair

3,082 reviews

Southwest

7.9

Good

4,250 reviews

Reviews

1 / 20

2.0

Mediocre

Thomas,Dec 2025

SEA - DEN

Plane two hours late in leaving 1:00 pm west coat time got home next day at 2:45am most car rental places are closed and don’t open till 5am

Related info for your journey

How long is the flight from District of Columbia to Illinois?
Airlines like Frontier, JetBlue, and Southwest fly from District of Columbia to Illinois in about 2h 10m. The time it takes to get you to your destination can typically vary by up to 9h 57m. District of Columbia and Illinois are separated by a distance of 599 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.
What are the cheapest airlines to fly from District of Columbia to Illinois one-way?
$16 is the cheapest one-way deal found within the past few days, from Frontier. You may also be able to find cheap deals on Spirit Airlines and American Airlines, with prices starting from $45 and $78, respectively.
Can I find deals for flights from District of Columbia to Illinois that include hotel bookings?
Yes. In addition to deals on District of Columbia to Illinois flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from District of Columbia to Illinois?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from District of Columbia to Illinois.
Can I find deals for business class flights from District of Columbia to Illinois?
Yes. Cheapflights offers flight deals from District of Columbia 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 District of Columbia to Illinois?
Currently, March is the cheapest month in which you can book a flight from District of Columbia to Illinois (average of $49). Flying from District of Columbia to Illinois in June is currently the most expensive (average of $133). 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

District of Columbia to Illinois flights

Top 6 airlines flying from District of Columbia to Illinois

Airline	Cheapest	Average	Flexibility	On-time
Spirit Airlines	Cheapest$52	Average$120	FlexibilityNo cancel fee	On-time65%
Frontier	Cheapest$58	Average$176	FlexibilityNo cancel fee	On-time62%
United Airlines	Cheapest$131	Average$343	FlexibilityNo cancel fee	On-time69%
Southwest	Cheapest$150	Average$294	FlexibilityNo cancel fee	On-time63%
American Airlines	Cheapest$154	Average$404	FlexibilityNo cancel fee	On-time71%
Delta	Cheapest$234	Average$404	FlexibilityNo cancel fee	On-timeN/A

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$62+ Cheap flights from District of Columbia 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 1/16. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from District of Columbia to Illinois with Cheapflights

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Cheap flight deals from District of Columbia to Illinois

Cheapest flights from District of Columbia to IllinoisExplore the most affordable flight options available from District of Columbia to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 16, 2025.

Explore the most affordable flight options available from District of Columbia to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 16, 2025.

Find flight deals from District of Columbia to Illinois

Keep the following information in mind while searching for District of Columbia to Illinois flight deals. Data was last updated December 16, 2025.

Most accurate provider

Most trusted provider

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Good round-trip deal

Good one-way deal

Cheapflights Fare Finder

Use the filters below to find and compare flights from District of Columbia to Illinois that are best for you.

Best time to book a flight from District of Columbia to Illinois

Have a flexible travel schedule? Discover the best time to fly to Illinois from District of Columbia with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from District of Columbia to Illinois

What is the cheapest month to book a flight from District of Columbia to Illinois?

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

Find hourly flight availability from District of Columbia 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 December 16, 2025.

What is the cheapest day to fly from District of Columbia to Illinois?

Use this chart to determine the cheapest time to fly round-trip from District of Columbia to Illinois. Price data was last updated on December 16, 2024.

How much does it cost to fly round-trip from District of Columbia to Illinois?

Reviews of airlines servicing Illinois

See what other customers who have flown with Southwest, United Airlines, and American Airlines from District of Columbia to Illinois have to say. Users have also rated airlines 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 District of Columbia to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

How long is the flight from District of Columbia to Illinois?

What are the cheapest airlines to fly from District of Columbia to Illinois one-way?

Can I find deals for flights from District of Columbia to Illinois that include hotel bookings?

How can I find direct flights from District of Columbia to Illinois?

Can I find deals for business class flights from District of Columbia to Illinois?

What is the cheapest month to book a flight from District of Columbia to Illinois?

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Alternative routes for District of Columbia to Illinois

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Top 6 airlines flying from District of Columbia to Illinois

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Cheapest flights from District of Columbia to Illinois
Explore the most affordable flight options available from District of Columbia to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 16, 2025.