$117+ Cheap flights from Dulles Intl (IAD) 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.
IAD — ORD
Dec 3 — Dec 101
Round-trip
1 adult, Economy
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Find cheap flights from Dulles Intl to Illinois with Cheapflights
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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 November 3, 2026.
Explore the most affordable flight options available from Dulles Intl to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 3, 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 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 11/2110:47 pm -
1 stop10h 27m
Tue 11/249:09 am -
1 stop4h 54m
Deal found 11/2![Frontier logo]()
$220
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/197:32 am -
1 stop12h 13m
Tue 11/247:49 am -
1 stop6h 14m
Deal found 10/30![Frontier logo]()
$224
This Mytrip deal was found by Cheapflights users on 10/29. 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 11/197:32 am -
2 stops16h 11m
Thu 11/267:49 am -
1 stop6h 14m
Deal found 10/29![Frontier logo]()
$226
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/1410:35 pm -
1 stop13h 58m
Mon 12/211:11 pm -
1 stop10h 40m
Deal found 10/30![Frontier logo]()
$226
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.
Thu 12/310:22 pm -
1 stop9h 53m
Sat 12/58:30 am -
1 stop5h 19m
Deal found 11/1![Frontier logo]()
$227
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.
Wed 11/187:48 am -
1 stop10h 59m
Thu 11/196:08 am -
1 stop16h 35m
Deal found 11/2![Frontier logo]()
$227
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.
Sat 12/1210:35 pm -
1 stop9h 45m
Mon 12/149:29 pm -
2 stops16h 20m
Deal found 10/31![Frontier logo]()
$228
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/38:57 pm -
1 stop13h 49m
Sat 12/510:40 am -
1 stop8h 30m
Deal found 10/30![Frontier logo]()
$228
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.
Tue 11/241:05 pm -
1 stop10h 16m
Fri 11/278:51 am -
1 stop11h 10m
Deal found 11/2![Frontier logo]()
$229
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.
Tue 11/246:50 am -
1 stop6h 31m
Fri 11/278:51 am -
1 stop11h 10m
Deal found 11/2![Frontier logo]()
$229
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/186:07 pm -
1 stop6h 40m
Sat 11/218:42 pm -
1 stop22h 58m
Deal found 10/30![Frontier logo]()
$230
Best flights from Dulles Intl to IllinoisDiscover 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 November 3, 2026.
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 November 3, 2026.
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 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 Kiwi.com deal was found by Cheapflights users on 10/29. 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.
Tue 11/249:35 pm -
1 stop11h 27m
Mon 11/307:50 pm -
2 stops38h 21m
Deal found 10/29![Multiple Airlines logo]()
$358
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/266:00 am -
1 stop5h 59m
Wed 12/26:00 am -
2 stops9h 34m
Deal found 10/30![American Airlines logo]()
$377
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/91:00 pm -
1 stop6h 14m
Sat 12/126:42 am -
1 stop5h 51m
Deal found 10/30![United Airlines logo]()
$291
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 11/1. 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.
Thu 12/1012:38 pm -
1 stop4h 38m
Fri 12/116:41 pm -
1 stop3h 42m
Deal found 11/1![Delta logo]()
$297
This United Airlines deal was found by Cheapflights users on 10/29. 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 12/131:00 pm -
Nonstop2h 24m
Tue 12/152:30 pm -
Nonstop2h 02m
Deal found 10/29![United Airlines logo]()
$308
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.
Thu 12/108:07 am -
1 stop4h 57m
Thu 12/106:41 pm -
1 stop3h 42m
Deal found 11/2![Delta logo]()
$297
This United Airlines 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/153:37 pm -
Nonstop2h 23m
Wed 12/166:15 pm -
Nonstop2h 03m
Deal found 10/30![United Airlines logo]()
$313
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.
Mon 12/76:00 am -
1 stop7h 04m
Fri 12/116:00 am -
1 stop4h 43m
Deal found 11/2![Delta logo]()
$297
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 11/139:33 am -
1 stop7h 36m
Mon 11/164:18 pm -
1 stop5h 41m
Deal found 11/1![American Airlines logo]()
$399
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 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.
Thu 2/256:00 am -
1 stop5h 05m
Thu 2/255:49 pm -
1 stop5h 42m
Deal found 11/2![Delta logo]()
$297
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 2/196:04 pm -
1 stop5h 08m
Mon 3/16:45 am -
2 stops9h 19m
Deal found 10/30![American Airlines logo]()
$405
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.
Fri 1/227:37 pm -
1 stop5h 18m
Mon 1/255:45 pm -
1 stop6h 01m
Deal found 11/1![Delta logo]()
$297
This United Airlines deal was found by Cheapflights users on 10/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1110:10 am -
Nonstop2h 23m
Sun 12/139:35 pm -
Nonstop1h 49m
Deal found 10/28![United Airlines logo]()
$328
This United Airlines deal was found by Cheapflights users on 10/29. 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 12/55:39 pm -
1 stop4h 36m
Sat 12/125:30 pm -
1 stop5h 54m
Deal found 10/29![United Airlines logo]()
$333
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.
Thu 12/36:00 am -
1 stop4h 37m
Sun 12/66:41 pm -
1 stop3h 42m
Deal found 10/31![Delta logo]()
$338
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 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/185:29 pm -
Nonstop2h 25m
Sat 11/219:41 pm -
Nonstop1h 49m
Deal found 10/31![United Airlines logo]()
$379
This American Airlines 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/308:07 pm -
2 stops18h 52m
Sat 12/55:44 am -
2 stops12h 00m
Deal found 10/30![American Airlines logo]()
$577
This Delta deal was found by Cheapflights users on 10/29. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/1912:32 pm -
1 stop4h 46m
Sun 11/226:44 pm -
1 stop3h 37m
Deal found 10/29![Delta logo]()
$345
This United Airlines deal was found by Cheapflights users on 10/29. 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 4/63:35 pm -
1 stop6h 23m
Sat 4/106:45 am -
1 stop5h 45m
Deal found 10/29![United Airlines logo]()
$391
This Delta deal was found by Cheapflights users on 10/29. 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 11/1712:32 pm -
1 stop5h 01m
Sat 11/216:00 am -
1 stop6h 54m
Deal found 10/29![Delta logo]()
$354
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.
Thu 12/246:10 am -
1 stop4h 50m
Mon 12/287:18 pm -
1 stop4h 20m
Deal found 11/1![United Airlines logo]()
$409
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.
Fri 1/89:00 am -
1 stop5h 18m
Sun 1/106:02 am -
1 stop7h 02m
Deal found 11/2![Delta logo]()
$360
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/301:05 pm -
1 stop5h 51m
Sun 1/37:18 pm -
1 stop4h 20m
Deal found 10/31![United Airlines logo]()
$415
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.
Fri 11/135:00 pm -
1 stop6h 31m
Sun 11/156:01 am -
1 stop4h 36m
Deal found 11/1![Delta logo]()
$374
This United 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/35:16 pm -
1 stop6h 43m
Sat 2/69:00 am -
1 stop6h 00m
Deal found 10/31![United Airlines logo]()
$433
Last-minute flights from Dulles Intl to IllinoisDiscover last-minute flight deals from Dulles Intl to Illinois. Data last updated November 3, 2026 and is based on user searches.
Discover last-minute flight deals from Dulles Intl to Illinois. Data last updated November 3, 2026 and is based on user searches.
This Expedia deal was found by Cheapflights users on 10/28. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/177:48 am -
1 stop11h 42m
Sat 11/217:49 am -
1 stop6h 14m
Deal found 10/28![Frontier logo]()
$227
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.
Wed 11/187:48 am -
1 stop10h 59m
Thu 11/196:08 am -
1 stop16h 35m
Deal found 11/2![Frontier logo]()
$227
This Trip.com 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/186:07 pm -
1 stop6h 40m
Sat 11/218:42 pm -
1 stop22h 58m
Deal found 10/30![Frontier logo]()
$230
This Kiwi.com 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/197:32 am -
1 stop12h 13m
Tue 11/247:49 am -
1 stop6h 14m
Deal found 10/30![Frontier logo]()
$224
This Mytrip deal was found by Cheapflights users on 10/29. 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 11/197:32 am -
2 stops16h 11m
Thu 11/267:49 am -
1 stop6h 14m
Deal found 10/29![Frontier logo]()
$226
This Cheapflightsfares deal was found by Cheapflights users on 10/28. 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 11/197:32 am -
1 stop12h 13m
Sun 11/227:49 am -
1 stop6h 14m
Deal found 10/28![Frontier logo]()
$231
This Cheapflightsfares deal was found by Cheapflights users on 10/29. 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.
Fri 11/2010:47 pm -
1 stop9h 46m
Mon 11/239:09 am -
1 stop4h 54m
Deal found 10/29![Frontier logo]()
$226
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 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 11/2110:47 pm -
1 stop10h 27m
Tue 11/249:09 am -
1 stop4h 54m
Deal found 11/2![Frontier logo]()
$220
This Cheapflightsfares 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/231:05 pm -
1 stop10h 16m
Fri 11/276:20 am -
1 stop6h 05m
Deal found 10/31![Frontier logo]()
$232
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.
Tue 11/241:05 pm -
1 stop10h 16m
Fri 11/278:51 am -
1 stop11h 10m
Deal found 11/2![Frontier logo]()
$229
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.
Tue 11/246:50 am -
1 stop6h 31m
Fri 11/278:51 am -
1 stop11h 10m
Deal found 11/2![Frontier logo]()
$229
One-way flights from Dulles Intl to IllinoisSearch for one-way flight options from Dulles Intl to Illinois. Find affordable one-way fares based on user searches. Data last updated November 3, 2026.
Search for one-way flight options from Dulles Intl to Illinois. Find affordable one-way fares based on user searches. Data last updated November 3, 2026.
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.
Mon 11/231:05 pm -
1 stop10h 16m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/2![Frontier logo]()
$117
This Super.com deal was found by Cheapflights users on 10/29. 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 11/147:48 am -
1 stop6h 03m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Frontier logo]()
$118
This Cheapflightsfares deal was found by Cheapflights users on 10/29. 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 stop6h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![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 Mytrip deal was found by Cheapflights users on 10/29. 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.
Wed 11/186:07 pm -
1 stop6h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Frontier logo]()
$119
This Frontier 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/225:30 am -
1 stop7h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/30![Frontier logo]()
$120
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.
Fri 12/181:55 pm -
1 stop10h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Frontier logo]()
$121
This Mytrip 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/176:07 pm -
1 stop6h 40m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Frontier logo]()
$121
This Super.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 Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/2010:47 pm -
1 stop9h 46m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/31![Frontier logo]()
$122
This Super.com deal was found by Cheapflights users on 10/29. 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 12/118:55 pm -
1 stop13h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Frontier logo]()
$123
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.
Tue 11/177:48 am -
1 stop11h 42m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 11/1![Frontier logo]()
$124
This Super.com deal was found by Cheapflights users on 10/29. 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 11/147:48 am -
1 stop10h 59m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Frontier logo]()
$124
Find 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 November 3, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $220 (Frontier) |
One-way from | $117 (Priceline) |
Popular in | October |
Cheapest in | January |
Average price | $318 |
Good round-trip deal | $412 or less |
Good one-way deal | $246 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Dulles Intl to Illinois that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated November 3, 2026.
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
Cheapest round-trip
Washington, D.C.Chicago
IAD Washington, D.C. Dulles Intl - ORD Chicago O'Hare Intl
IADORD
Washington, D.C. Dulles Intl
Mon 12/7
8:15 am-9:37 am
Nonstop2h 22m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$130
Washington, D.C.Chicago
IAD Washington, D.C. Dulles Intl - MDW Chicago Midway
IADMDW
Washington, D.C. Dulles Intl
Sun 12/13
10:35 pm-4:06 pm
1 stop18h 31m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$134
Quickest round-trip
Washington, D.C.Chicago
IAD Washington, D.C. Dulles Intl - ORD Chicago O'Hare Intl
IADORD
Washington, D.C. Dulles Intl
Fri 11/27
10:47 pm-12:01 am
Nonstop2h 14m
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
Sat 11/21
3:37 pm-5:00 pm
Nonstop2h 23m
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 - MDW Chicago Midway
IADMDW
Washington, D.C. Dulles Intl
Thu 12/24
6:00 am-8:49 am
1 stop3h 49m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$149
Washington, D.C.Chicago
IAD Washington, D.C. Dulles Intl - MDW Chicago Midway
IADMDW
Washington, D.C. Dulles Intl
Mon 12/21
6:00 am-8:49 am
1 stop3h 49m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$149
Washington, D.C.Chicago
IAD Washington, D.C. Dulles Intl - MDW Chicago Midway
IADMDW
Washington, D.C. Dulles Intl
Sat 12/5
5:27 pm-10:54 pm
1 stop6h 27m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$149
Washington, D.C.Chicago
IAD Washington, D.C. Dulles Intl - MDW Chicago Midway
IADMDW
Washington, D.C. Dulles Intl
Tue 11/24
6:00 am-9:46 am
1 stop4h 46m
Chicago Midway
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$149
Washington, D.C.Chicago
IAD Washington, D.C. Dulles Intl - ORD Chicago O'Hare Intl
IADORD
Washington, D.C. Dulles Intl
Sat 12/19
10:45 pm-12:01 am
Nonstop2h 16m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$157
Washington, D.C.Chicago
IAD Washington, D.C. Dulles Intl - ORD Chicago O'Hare Intl
IADORD
Washington, D.C. Dulles Intl
Wed 12/23
1:05 pm-2:29 pm
Nonstop2h 24m
Chicago O'Hare Intl
Wed 12/31
12:00 am-1:00 am
Nonstop0h 00m
$157
Showing 1-10 of 60 resultsSorted by cheapest first
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.
IAD-ORD
IAD-MDW
IAD-PIA
IAD-MLI
IAD-BMI
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
IAD-USIL
IAD-ORD
IAD-MDW
IAD-PIA
IAD-MLI
What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to Illinois?
Currently, September is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to Illinois (average of $339). Flying from Washington, D.C. Dulles Intl Airport to Illinois in January is currently the most expensive (average of $446). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
What is the cheapest time of day to fly from IAD to IL?
Find hourly flight availability from Dulles Intl to Illinois. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated November 3, 2026.
It’s typically best to fly out from Washington, D.C. Dulles Intl Airport to Illinois in the evening. Doing so could potentially save you 13% on the flight price compared to flying in the afternoon, which is usually more expensive.
Weekly flight availability from Washington, D.C. Dulles Intl Airport to Illinois
Explore weekly flight availability from Dulles Intl to Illinois. Discover flights operating on different days of the week, giving you the flexibility to choose a travel day that best fits your plans. Compare info to find the most convenient option for your journey. Data last updated November 3, 2026.
The most flights from IAD to USIL are scheduled on a Sunday (34 on average). You will have fewer flight options on Saturday, which is when the least amount of flights are scheduled (5 on average).
How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport to Illinois?
Airfare is below average for this route at the moment.
Washington, D.C. Dulles Intl Airport to Illinois flights typically cost between $327 and $538 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. Dulles Intl Airport to Illinois?
Booking 85 days in advance of your planned departure date is, on average, the best time to get cheap flights from Washington, D.C. Dulles Intl Airport to Illinois. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest day to fly from Washington, D.C. Dulles Intl Airport to Illinois?
Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Illinois. Price data was last updated on October 31, 2026.
Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to Illinois flight should consider departing on Wednesday evenings when fares are most often at their lowest. Sunday afternoons 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 3, 2026.
See what other customers who have flown with United Airlines and Frontier 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.
Boarding
7.7
Comfort
7.3
Food
6.7
Entertainment
7.1
Crew
8.1
Overall
7.3
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
IAD - TYS
Boarding
7.7
Comfort
7.3
Food
6.7
Entertainment
7.1
Crew
8.1
Overall
7.3
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
IAD - TYS
Boarding
7.7
Comfort
7.3
Food
6.7
Entertainment
7.1
Crew
8.1
Overall
7.3
Reviews
1 / 20
10.0
ExcellentDane,Jan 2026
IAD - TYS
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.
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Alternative routes for Dulles Intl to Illinois
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Complete your trip
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Dulles Intl and Illinois flights
Browse other Dulles Intl and Illinois flight options. Last updated on November 3, 2026.
Popular flight searches
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Dulles Intl to Illinois flights
Consider these flights traveling from Dulles Intl to Illinois.
Top 2 airlines flying from Dulles Intl to Illinois
Discover the top 2 airlines that operate flights from Dulles Intl to Illinois. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 7,457,451 searches. Data last updated November 3, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$70 | Average$260 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$207 | Average$409 | FlexibilityNo cancel fee | On-time69% |