$116+ Cheap flights from Washington, D.C. (WAS) to Illinois
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 11/23. Fares are subject to change and may not be available on all flights or dates of travel.
WAS — ORD
Dec 4 — Dec 111
Round-trip
1 adult, Economy
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Find cheap flights from Washington, D.C. to Illinois with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Washington, D.C. to Illinois
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Cheapest flights from Washington, D.C. to IllinoisExplore the most affordable flight options available from Washington, D.C. to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 4, 2026.
Explore the most affordable flight options available from Washington, D.C. to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 4, 2026.
This Frontier deal was found by Cheapflights users on 11/2. 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.
Sat 11/219:56 pm -
1 stop10h 51m
Tue 11/247:49 am -
1 stop6h 14m
Deal found 11/2![Frontier logo]()
$220
This Orbitz deal was found by Cheapflights users on 11/3. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/136:07 pm -
1 stop22h 30m
Mon 11/167:55 am -
1 stop11h 16m
Deal found 11/3![Frontier logo]()
$223
This Kiwi.com deal was found by Cheapflights users on 11/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/910:35 pm -
2 stops16h 25m
Sat 12/1210:00 am -
1 stop9h 10m
Deal found 11/3![Frontier logo]()
$224
This Kiwi.com deal was found by Cheapflights users on 11/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/310:22 pm -
1 stop9h 53m
Sun 12/68:30 am -
1 stop5h 19m
Deal found 11/3![Frontier logo]()
$225
This Trip.com deal was found by Cheapflights users on 11/3. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/126:00 pm -
1 stop7h 54m
Mon 12/147:25 am -
1 stop8h 30m
Deal found 11/3![Frontier logo]()
$226
This Mytrip deal was found by Cheapflights users on 11/3. 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.
Thu 12/33:33 pm -
2 stops16h 42m
Mon 12/710:29 pm -
1 stop15h 20m
Deal found 11/3![Frontier logo]()
$226
This CheapOair deal was found by Cheapflights users on 11/2. 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.
Wed 12/27:00 am -
1 stop18h 53m
Fri 12/47:00 am -
1 stop13h 55m
Deal found 11/2![Frontier logo]()
$227
This Cheapflightsfares deal was found by Cheapflights users on 11/3. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/246:50 am -
1 stop7h 54m
Fri 11/278:51 am -
1 stop11h 10m
Deal found 11/3![Frontier logo]()
$227
This Mytrip deal was found by Cheapflights users on 11/3. 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.
Sat 12/510:35 pm -
2 stops25h 31m
Fri 12/1110:29 pm -
1 stop15h 20m
Deal found 11/3![Frontier logo]()
$228
This Frontier deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/43:10 pm -
1 stop8h 01m
Sat 12/58:30 am -
1 stop5h 19m
Deal found 11/4![Frontier logo]()
$229
This CheapOair deal was found by Cheapflights users on 11/1. 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.
Wed 11/257:00 am -
1 stop18h 53m
Wed 12/27:00 am -
1 stop13h 55m
Deal found 11/1![Frontier logo]()
$230
This Cheapflightsfares deal was found by Cheapflights users on 11/4. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/117:48 am -
1 stop11h 42m
Mon 11/167:55 am -
1 stop11h 16m
Deal found 11/4![Frontier logo]()
$230
Best flights from Washington, D.C. to IllinoisDiscover carefully curated flight deals from Washington, D.C. to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 4, 2026.
Discover carefully curated flight deals from Washington, D.C. to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated November 4, 2026.
This American Airlines deal was found by Cheapflights users on 10/31. 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.
Sat 12/58:24 am -
2 stops7h 16m
Sat 12/123:12 pm -
2 stops7h 47m
Deal found 10/31![American Airlines logo]()
$267
This United Airlines deal was found by Cheapflights users on 11/4. 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.
Thu 12/37:42 am -
Nonstop2h 18m
Mon 12/75:00 pm -
Nonstop2h 11m
Deal found 11/4![United Airlines logo]()
$277
This Southwest deal was found by Cheapflights users on 11/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/311:00 am -
Nonstop2h 05m
Mon 12/74:15 pm -
Nonstop1h 45m
Deal found 11/2![Southwest logo]()
$277
This Delta deal was found by Cheapflights users on 10/30. 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.
Mon 1/119:55 am -
1 stop4h 01m
Mon 1/115:18 pm -
1 stop4h 48m
Deal found 10/30![Delta logo]()
$297
This United Airlines deal was found by Cheapflights users on 11/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/1610:10 am -
Nonstop2h 23m
Sat 12/197:04 am -
Nonstop1h 58m
Deal found 11/3![United Airlines logo]()
$277
This Southwest deal was found by Cheapflights users on 11/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/102:40 pm -
1 stop4h 10m
Tue 12/157:25 am -
Nonstop1h 50m
Deal found 11/2![Southwest logo]()
$283
This Delta deal was found by Cheapflights users on 11/1. 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 12/112:30 pm -
1 stop4h 47m
Fri 12/411:39 am -
1 stop6h 00m
Deal found 11/1![Delta logo]()
$297
This United Airlines deal was found by Cheapflights users on 11/1. 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 12/226:10 am -
Nonstop2h 22m
Tue 12/298:52 am -
Nonstop2h 02m
Deal found 11/1![United Airlines logo]()
$277
This Southwest deal was found by Cheapflights users on 10/31. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/258:25 am -
1 stop4h 40m
Wed 12/308:55 pm -
Nonstop1h 45m
Deal found 10/31![Southwest logo]()
$287
This American Airlines deal was found by Cheapflights users on 11/2. 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 1/810:10 am -
1 stop5h 12m
Sun 1/102:52 pm -
2 stops8h 07m
Deal found 11/2![American Airlines logo]()
$325
This Delta deal was found by Cheapflights users on 10/31. 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.
Fri 12/117:39 pm -
1 stop5h 17m
Mon 12/145:02 pm -
1 stop5h 21m
Deal found 10/31![Delta logo]()
$297
This United Airlines deal was found by Cheapflights users on 11/2. 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.
Thu 12/245:20 pm -
Nonstop2h 30m
Fri 1/88:40 am -
Nonstop2h 02m
Deal found 11/2![United Airlines logo]()
$277
This Southwest deal was found by Cheapflights users on 11/3. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/101:00 pm -
Nonstop2h 15m
Mon 12/148:15 am -
1 stop4h 50m
Deal found 11/3![Southwest logo]()
$287
This Delta deal was found by Cheapflights users on 11/1. 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 12/296:00 am -
1 stop4h 49m
Tue 1/53:01 pm -
1 stop5h 16m
Deal found 11/1![Delta logo]()
$297
This Delta deal was found by Cheapflights users on 11/2. 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 11/246:10 am -
1 stop4h 36m
Fri 11/276:00 am -
1 stop4h 31m
Deal found 11/2![Delta logo]()
$297
This American Airlines deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/27:00 am -
2 stops7h 48m
Wed 12/95:44 am -
2 stops9h 50m
Deal found 11/4![American Airlines logo]()
$369
This Southwest deal was found by Cheapflights users on 10/31. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/142:40 pm -
1 stop4h 10m
Thu 12/1710:05 am -
2 stops7h 10m
Deal found 10/31![Southwest logo]()
$308
This United Airlines deal was found by Cheapflights users on 11/2. 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.
Sun 12/2010:45 pm -
Nonstop2h 16m
Fri 12/2511:09 am -
Nonstop2h 03m
Deal found 11/2![United Airlines logo]()
$318
This American Airlines deal was found by Cheapflights users on 11/4. 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 11/196:00 am -
1 stop5h 55m
Mon 11/234:19 pm -
1 stop6h 40m
Deal found 11/4![American Airlines logo]()
$379
This Delta deal was found by Cheapflights users on 10/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/56:30 pm -
1 stop5h 31m
Mon 12/75:00 pm -
1 stop4h 41m
Deal found 10/31![Delta logo]()
$315
This United Airlines deal was found by Cheapflights users on 11/2. 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.
Thu 12/1010:15 pm -
Nonstop2h 14m
Sun 12/138:52 am -
Nonstop2h 01m
Deal found 11/2![United Airlines logo]()
$318
This Southwest deal was found by Cheapflights users on 10/31. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/92:40 pm -
1 stop4h 10m
Sun 12/1311:00 am -
Nonstop1h 50m
Deal found 10/31![Southwest logo]()
$324
This Delta deal was found by Cheapflights users on 11/4. 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 12/25:00 pm -
1 stop6h 26m
Wed 12/912:06 pm -
1 stop7h 05m
Deal found 11/4![Delta logo]()
$320
This Southwest deal was found by Cheapflights users on 11/2. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/79:00 pm -
Nonstop2h 10m
Sun 1/1010:10 am -
1 stop4h 25m
Deal found 11/2![Southwest logo]()
$328
This American Airlines deal was found by Cheapflights users on 11/1. 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 11/136:22 pm -
1 stop6h 41m
Mon 11/164:18 pm -
1 stop4h 42m
Deal found 11/1![American Airlines logo]()
$399
This United Airlines deal was found by Cheapflights users on 11/3. 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 1/112:40 pm -
1 stop3h 48m
Mon 1/119:47 pm -
Nonstop1h 58m
Deal found 11/3![United Airlines logo]()
$343
This American Airlines deal was found by Cheapflights users on 11/4. 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 11/198:43 am -
1 stop6h 16m
Mon 11/232:33 pm -
1 stop6h 56m
Deal found 11/4![American Airlines logo]()
$399
This Delta deal was found by Cheapflights users on 10/31. 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.
Fri 12/46:00 am -
1 stop5h 26m
Mon 12/76:10 am -
1 stop4h 33m
Deal found 10/31![Delta logo]()
$339
This United Airlines deal was found by Cheapflights users on 11/3. 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.
Sat 11/286:25 am -
Nonstop2h 18m
Thu 12/33:00 pm -
Nonstop2h 15m
Deal found 11/3![United Airlines logo]()
$358
This American Airlines deal was found by Cheapflights users on 11/1. 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 11/136:22 pm -
1 stop6h 37m
Sun 11/155:00 am -
2 stops6h 59m
Deal found 11/1![American Airlines logo]()
$409
Last-minute flights from Washington, D.C. to IllinoisDiscover last-minute flight deals from Washington, D.C. to Illinois. Data last updated November 4, 2026 and is based on user searches.
Discover last-minute flight deals from Washington, D.C. to Illinois. Data last updated November 4, 2026 and is based on user searches.
This Cheapflightsfares deal was found by Cheapflights users on 11/4. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/117:48 am -
1 stop11h 42m
Mon 11/167:55 am -
1 stop11h 16m
Deal found 11/4![Frontier logo]()
$230
This Orbitz deal was found by Cheapflights users on 11/3. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/136:07 pm -
1 stop22h 30m
Mon 11/167:55 am -
1 stop11h 16m
Deal found 11/3![Frontier logo]()
$223
This Frontier deal was found by Cheapflights users on 11/2. 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.
Sat 11/219:56 pm -
1 stop10h 51m
Tue 11/247:49 am -
1 stop6h 14m
Deal found 11/2![Frontier logo]()
$220
This Cheapflightsfares deal was found by Cheapflights users on 11/3. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/246:50 am -
1 stop7h 54m
Fri 11/278:51 am -
1 stop11h 10m
Deal found 11/3![Frontier logo]()
$227
This CheapOair deal was found by Cheapflights users on 11/1. 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.
Wed 11/257:00 am -
1 stop18h 53m
Wed 12/27:00 am -
1 stop13h 55m
Deal found 11/1![Frontier logo]()
$230
This CheapOair deal was found by Cheapflights users on 11/2. 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.
Wed 12/27:00 am -
1 stop18h 53m
Fri 12/47:00 am -
1 stop13h 55m
Deal found 11/2![Frontier logo]()
$227
This Kiwi.com deal was found by Cheapflights users on 11/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/310:22 pm -
1 stop9h 53m
Sun 12/68:30 am -
1 stop5h 19m
Deal found 11/3![Frontier logo]()
$225
This Mytrip deal was found by Cheapflights users on 11/3. 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.
Thu 12/33:33 pm -
2 stops16h 42m
Mon 12/710:29 pm -
1 stop15h 20m
Deal found 11/3![Frontier logo]()
$226
This Frontier deal was found by Cheapflights users on 11/4. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/43:10 pm -
1 stop8h 01m
Sat 12/58:30 am -
1 stop5h 19m
Deal found 11/4![Frontier logo]()
$229
This Mytrip deal was found by Cheapflights users on 11/3. 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.
Sat 12/510:35 pm -
2 stops25h 31m
Fri 12/1110:29 pm -
1 stop15h 20m
Deal found 11/3![Frontier logo]()
$228
This Kiwi.com deal was found by Cheapflights users on 11/3. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/910:35 pm -
2 stops16h 25m
Sat 12/1210:00 am -
1 stop9h 10m
Deal found 11/3![Frontier logo]()
$224
This Trip.com deal was found by Cheapflights users on 11/3. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/126:00 pm -
1 stop7h 54m
Mon 12/147:25 am -
1 stop8h 30m
Deal found 11/3![Frontier logo]()
$226
One-way flights from Washington, D.C. to IllinoisSearch for one-way flight options from Washington, D.C. to Illinois. Find affordable one-way fares based on user searches. Data last updated November 4, 2026.
Search for one-way flight options from Washington, D.C. to Illinois. Find affordable one-way fares based on user searches. Data last updated November 4, 2026.
This Super.com deal was found by Cheapflights users on 11/1. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/236:00 pm -
1 stop7h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Frontier logo]()
$116
This Priceline deal was found by Cheapflights users on 11/2. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/36:00 pm -
1 stop7h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![Frontier logo]()
$117
This Frontier deal was found by Cheapflights users on 11/3. 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.
Thu 11/263:58 pm -
1 stop8h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Frontier logo]()
$117
This Super.com deal was found by Cheapflights users on 11/3. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/216:00 pm -
1 stop7h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Frontier logo]()
$118
This Kiwi.com deal was found by Cheapflights users on 11/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/216:50 am -
1 stop17h 28m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![Frontier logo]()
$118
This Mytrip deal was found by Cheapflights users on 10/31. 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.
Fri 11/2010:47 pm -
1 stop15h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![Frontier logo]()
$119
This Trip.com deal was found by Cheapflights users on 10/31. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/76:00 pm -
1 stop7h 54m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![Frontier logo]()
$120
This Kiwi.com deal was found by Cheapflights users on 11/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/215:30 am -
1 stop7h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Frontier logo]()
$120
This Cheapflightsfares deal was found by Cheapflights users on 11/2. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/261:54 pm -
1 stop11h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![Frontier logo]()
$121
This Super.com deal was found by Cheapflights users on 11/2. 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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/181:55 pm -
1 stop10h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![Frontier logo]()
$121
This Mytrip deal was found by Cheapflights users on 11/3. 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.
Mon 11/2310:47 pm -
1 stop15h 57m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/3![Frontier logo]()
$122
This Trip.com deal was found by Cheapflights users on 11/1. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/176:00 pm -
1 stop7h 21m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Frontier logo]()
$123
Find flight deals from Washington, D.C. to Illinois
Keep the following information in mind while searching for Washington, D.C. to Illinois flight deals. Data was last updated November 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $220 (Frontier) |
One-way from | $116 (Super.com) |
Popular in | October |
Cheapest in | January |
Average price | $318 |
Good round-trip deal | $323 or less |
Good one-way deal | $166 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Washington, D.C. 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 7,457,451 searches. Data last updated November 4, 2026.
Use the filters below to find and compare flights from Washington, D.C. to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
Washington, D.C.Chicago
DCA Washington, D.C. Reagan-National - ORD Chicago O'Hare Intl
DCAORD
Washington, D.C. Reagan-National
Thu 12/24
7:40 am-12:26 am
1 stop17h 46m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$123
Washington, D.C.Chicago
DCA Washington, D.C. Reagan-National - ORD Chicago O'Hare Intl
DCAORD
Washington, D.C. Reagan-National
Wed 1/20
7:05 pm-8:35 pm
Nonstop2h 30m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$139
Washington, D.C.Chicago
DCA Washington, D.C. Reagan-National - ORD Chicago O'Hare Intl
DCAORD
Washington, D.C. Reagan-National
Thu 12/24
5:06 pm-6:30 pm
Nonstop2h 24m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$139
Quickest round-trip
Washington, D.C.Chicago
DCA Washington, D.C. Reagan-National - MDW Chicago Midway
DCAMDW
Washington, D.C. Reagan-National
Thu 12/17
10:45 am-11:50 am
Nonstop2h 05m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$139
Washington, D.C.Chicago
DCA Washington, D.C. Reagan-National - ORD Chicago O'Hare Intl
DCAORD
Washington, D.C. Reagan-National
Wed 11/25
6:06 pm-7:30 pm
Nonstop2h 24m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$139
Washington, D.C.Chicago
DCA Washington, D.C. Reagan-National - MDW Chicago Midway
DCAMDW
Washington, D.C. Reagan-National
Wed 12/23
9:00 pm-10:05 pm
Nonstop2h 05m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$139
Washington, D.C.Chicago
DCA Washington, D.C. Reagan-National - ORD Chicago O'Hare Intl
DCAORD
Washington, D.C. Reagan-National
Thu 12/17
6:30 am-7:52 am
Nonstop2h 22m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$139
Washington, D.C.Chicago
DCA Washington, D.C. Reagan-National - MDW Chicago Midway
DCAMDW
Washington, D.C. Reagan-National
Fri 11/27
6:30 pm-7:40 pm
Nonstop2h 10m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$139
Washington, D.C.Chicago
IAD Washington, D.C. Dulles Intl - ORD Chicago O'Hare Intl
IADORD
Washington, D.C. Dulles Intl
Fri 12/4
3:37 pm-5:01 pm
Nonstop2h 24m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$139
Washington, D.C.Chicago
IAD Washington, D.C. Dulles Intl - ORD Chicago O'Hare Intl
IADORD
Washington, D.C. Dulles Intl
Mon 12/7
10:10 am-11:33 am
Nonstop2h 23m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$139
Showing 1-10 of 60 resultsSorted by cheapest first
Best time to book a flight from Washington, D.C. to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Washington, D.C. with our price prediction graph.
DCA-ORD
DCA-MDW
DCA-SPI
DCA-MLI
IAD-ORD
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. to Illinois
WAS-USIL
DCA-ORD
DCA-MDW
DCA-SPI
DCA-MLI
What is the cheapest month to book a flight from Washington, D.C. to Illinois?
Currently, January is the cheapest month in which you can book a flight from Washington, D.C. to Illinois (average of $298). Flying from Washington, D.C. to Illinois in October is currently the most expensive (average of $401). 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 WAS to IL?
Find hourly flight availability from Washington, D.C. 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 4, 2026.
One of the essential ways to save on airfare from Washington, D.C. to Illinois is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight at noon could potentially save you up to 10% on airfare.
Weekly flight availability from Washington, D.C. to Illinois
Explore weekly flight availability from Washington, D.C. 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 4, 2026.
The most flights from WAS to USIL are scheduled on a Monday (91 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (35 on average).
How much does it cost to fly round-trip from Washington, D.C. to Illinois?
Airfare is below average for this route at the moment.
Washington, D.C. to Illinois flights typically cost between $233 and $452 in November.The cheapest round-trip price found within the last 5 days was $220 on Frontier (Nov 21-Nov 24).
How far ahead should I book a flight from Washington, D.C. to Illinois?
The best time to book flights from Washington, D.C. to Illinois is 59 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest day to fly from Washington, D.C. to Illinois?
Use this chart to determine the cheapest time to fly round-trip from Washington, D.C. to Illinois. Price data was last updated on October 31, 2026.
Travelers seeking maximum savings on their Washington, D.C. to Illinois flight should consider departing on Friday at noon when fares are most often at their lowest. Sunday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
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 4, 2026.
Peruse reviews from past customers who have flown with Southwest,Delta, andUnited Airlines from Washington, D.C. to Illinois to help guide your decision. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Crew
8.6
Comfort
8.0
Entertainment
7.5
Food
7.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Comfort
8.0
Entertainment
7.5
Food
7.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Comfort
8.0
Entertainment
7.5
Food
7.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Comfort
8.0
Entertainment
7.5
Food
7.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Comfort
8.0
Entertainment
7.5
Food
7.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Crew
8.6
Comfort
8.0
Entertainment
7.5
Food
7.0
Overall
8.0
Boarding
8.1
Reviews
1 / 20
6.0
GoodReza,Jun 2026
TPA - MDW
Related info for your journey
Find useful and relevant information for your journey from Washington, D.C. to Illinois. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for Washington, D.C. to Illinois
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Complete your trip
Complete your trip to Illinois by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Washington, D.C. to Illinois by cabin class
Find flights from Washington, D.C. to Illinois, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Washington, D.C. and Illinois flights
Browse other Washington, D.C. and Illinois flight options. Last updated on November 4, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Washington, D.C. to Illinois flights
Consider these flights traveling from Washington, D.C. to Illinois.
Top 5 airlines flying from Washington, D.C. to Illinois
Discover the top 5 airlines that operate flights from Washington, D.C. 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 7,457,451 searches. Data last updated November 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$29 | Average$234 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$131 | Average$407 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$197 | Average$403 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$198 | Average$378 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$308 | Average$413 | FlexibilityNo cancel fee | On-timeN/A |