$205+ Cheap flights from Helena (HLN) to Illinois
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/6. Fares are subject to change and may not be available on all flights or dates of travel.
HLN — ORD
Sep 26 — Oct 31
Round-trip
1 adult, Economy
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Find cheap flights from Helena 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
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Cheapest flights from Helena to IllinoisExplore the most affordable flight options available from Helena to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 27, 2026.
Explore the most affordable flight options available from Helena to Illinois. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 27, 2026.
This Alaska Airlines deal was found by Cheapflights users on 8/24. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/94:41 pm -
1 stop20h 44m
Fri 11/137:00 am -
1 stop10h 04m
Deal found 8/24![Alaska Airlines logo]()
$369
This Delta deal was found by Cheapflights users on 8/24. 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 9/1012:57 pm -
1 stop7h 34m
Wed 9/168:00 am -
1 stop5h 17m
Deal found 8/24![Delta logo]()
$374
This United Airlines deal was found by Cheapflights users on 8/23. 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 9/102:26 pm -
1 stop5h 12m
Tue 9/1511:15 am -
2 stops11h 15m
Deal found 8/23![United Airlines logo]()
$379
This Delta deal was found by Cheapflights users on 8/24. 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 9/97:15 am -
1 stop5h 15m
Tue 9/151:55 pm -
2 stops9h 29m
Deal found 8/24![Delta logo]()
$409
This Delta deal was found by Cheapflights users on 8/22. 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.
Sun 9/65:40 am -
1 stop5h 19m
Thu 9/101:55 pm -
2 stops9h 29m
Deal found 8/22![Delta logo]()
$414
This United Airlines deal was found by Cheapflights users on 8/26. 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 11/72:23 pm -
1 stop5h 36m
Tue 11/104:39 pm -
1 stop5h 52m
Deal found 8/26![United Airlines logo]()
$429
This Delta deal was found by Cheapflights users on 8/24. 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 9/56:50 am -
1 stop5h 48m
Thu 9/105:00 pm -
1 stop6h 24m
Deal found 8/24![Delta logo]()
$444
This United Airlines deal was found by Cheapflights users on 8/23. 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 9/122:26 pm -
1 stop7h 19m
Mon 9/212:32 pm -
1 stop7h 58m
Deal found 8/23![United Airlines logo]()
$447
This United Airlines deal was found by Cheapflights users on 8/24. 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 9/52:35 pm -
1 stop8h 05m
Thu 9/1010:53 am -
2 stops11h 37m
Deal found 8/24![United Airlines logo]()
$449
This Delta deal was found by Cheapflights users on 8/22. 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.
Sun 9/65:40 am -
2 stops9h 17m
Thu 9/102:00 pm -
2 stops9h 24m
Deal found 8/22![Delta logo]()
$454
This Expedia deal was found by Cheapflights users on 8/26. 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 9/155:18 pm -
1 stop20h 03m
Thu 10/154:42 pm -
1 stop25h 07m
Deal found 8/26![Alaska Airlines logo]()
$494
This Alaska Airlines deal was found by Cheapflights users on 8/26. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/105:26 pm -
1 stop11h 14m
Sat 10/177:00 am -
1 stop10h 49m
Deal found 8/26![Alaska Airlines logo]()
$499
Best flights from Helena to IllinoisDiscover carefully curated flight deals from Helena to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 27, 2026.
Discover carefully curated flight deals from Helena to Illinois that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated August 27, 2026.
This Alaska Airlines deal was found by Cheapflights users on 8/24. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/104:41 pm -
1 stop20h 44m
Fri 11/137:00 am -
1 stop10h 04m
Deal found 8/24![Alaska Airlines logo]()
$369
This United Airlines deal was found by Cheapflights users on 8/23. 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 9/102:26 pm -
1 stop8h 05m
Tue 9/154:40 pm -
1 stop5h 50m
Deal found 8/23![United Airlines logo]()
$374
This Delta deal was found by Cheapflights users on 8/26. 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 9/1212:57 pm -
2 stops9h 45m
Sat 9/195:00 pm -
1 stop6h 29m
Deal found 8/26![Delta logo]()
$379
This Delta deal was found by Cheapflights users on 8/24. 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 9/1012:57 pm -
2 stops9h 45m
Wed 9/168:00 am -
1 stop5h 17m
Deal found 8/24![Delta logo]()
$414
This United Airlines deal was found by Cheapflights users on 8/22. 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 2/62:30 pm -
1 stop5h 33m
Tue 2/92:26 pm -
2 stops7h 33m
Deal found 8/22![United Airlines logo]()
$424
This Delta deal was found by Cheapflights users on 8/22. 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.
Sun 9/65:40 am -
1 stop5h 19m
Thu 9/101:55 pm -
2 stops9h 29m
Deal found 8/22![Delta logo]()
$414
This United Airlines deal was found by Cheapflights users on 8/24. 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 11/72:23 pm -
1 stop5h 36m
Tue 11/104:39 pm -
1 stop5h 52m
Deal found 8/24![United Airlines logo]()
$429
This United Airlines deal was found by Cheapflights users on 8/23. 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 1/232:30 pm -
1 stop7h 49m
Wed 1/272:18 pm -
1 stop7h 41m
Deal found 8/23![United Airlines logo]()
$429
This Alaska Airlines deal was found by Cheapflights users on 8/26. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/155:26 pm -
1 stop11h 14m
Mon 10/197:16 pm -
1 stop22h 33m
Deal found 8/26![Alaska Airlines logo]()
$544
This Delta deal was found by Cheapflights users on 8/22. 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.
Sun 9/65:40 am -
2 stops9h 17m
Thu 9/102:00 pm -
2 stops9h 24m
Deal found 8/22![Delta logo]()
$454
This United Airlines deal was found by Cheapflights users on 8/23. 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 9/122:26 pm -
1 stop7h 19m
Mon 9/212:32 pm -
1 stop7h 58m
Deal found 8/23![United Airlines logo]()
$447
This Delta deal was found by Cheapflights users on 8/26. 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 10/91:08 pm -
1 stop7h 57m
Mon 10/127:35 am -
1 stop5h 53m
Deal found 8/26![Delta logo]()
$529
This United Airlines deal was found by Cheapflights users on 8/25. 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 9/92:26 pm -
1 stop6h 34m
Sun 9/137:00 am -
1 stop7h 45m
Deal found 8/25![United Airlines logo]()
$524
This Delta deal was found by Cheapflights users on 8/23. 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 9/75:40 am -
2 stops11h 53m
Fri 9/1111:35 am -
2 stops11h 49m
Deal found 8/23![Delta logo]()
$949
This Delta deal was found by Cheapflights users on 8/24. 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 9/287:15 am -
2 stops10h 18m
Wed 9/302:00 pm -
2 stops9h 24m
Deal found 8/24![Delta logo]()
$1,019
This Delta deal was found by Cheapflights users on 8/25. 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 10/157:15 am -
2 stops9h 45m
Mon 10/1912:27 pm -
2 stops10h 57m
Deal found 8/25![Delta logo]()
$1,189
This Delta deal was found by Cheapflights users on 8/26. 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 10/107:15 am -
2 stops9h 45m
Sat 10/1712:27 pm -
2 stops11h 02m
Deal found 8/26![Delta logo]()
$1,199
This Delta deal was found by Cheapflights users on 8/25. 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 9/97:15 am -
2 stops10h 04m
Sun 9/131:19 pm -
2 stops10h 05m
Deal found 8/25![Delta logo]()
$1,259
Last-minute flights from Helena to IllinoisDiscover last-minute flight deals from Helena to Illinois. Data last updated August 27, 2026 and is based on user searches.
Discover last-minute flight deals from Helena to Illinois. Data last updated August 27, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 8/25. 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 8/296:15 am -
1 stop6h 15m
Tue 9/13:56 pm -
1 stop6h 34m
Deal found 8/25![United Airlines logo]()
$509
This Delta deal was found by Cheapflights users on 8/25. 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 8/2912:55 pm -
1 stop7h 38m
Tue 9/13:51 pm -
2 stops7h 39m
Deal found 8/25![Delta logo]()
$514
This Delta deal was found by Cheapflights users on 8/24. 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 9/56:50 am -
1 stop5h 48m
Thu 9/105:00 pm -
1 stop6h 24m
Deal found 8/24![Delta logo]()
$444
This United Airlines deal was found by Cheapflights users on 8/24. 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 9/52:35 pm -
1 stop8h 05m
Thu 9/1010:53 am -
2 stops11h 37m
Deal found 8/24![United Airlines logo]()
$449
This Delta deal was found by Cheapflights users on 8/22. 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.
Sun 9/65:40 am -
1 stop5h 19m
Thu 9/101:55 pm -
2 stops9h 29m
Deal found 8/22![Delta logo]()
$414
This Delta deal was found by Cheapflights users on 8/22. 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.
Sun 9/65:40 am -
2 stops9h 17m
Thu 9/102:00 pm -
2 stops9h 24m
Deal found 8/22![Delta logo]()
$454
This Delta deal was found by Cheapflights users on 8/24. 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 9/97:15 am -
1 stop5h 15m
Tue 9/151:55 pm -
2 stops9h 29m
Deal found 8/24![Delta logo]()
$409
This United Airlines deal was found by Cheapflights users on 8/25. 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 9/92:26 pm -
1 stop6h 34m
Sun 9/137:00 am -
1 stop7h 45m
Deal found 8/25![United Airlines logo]()
$524
This Delta deal was found by Cheapflights users on 8/24. 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 9/1012:57 pm -
1 stop7h 34m
Wed 9/168:00 am -
1 stop5h 17m
Deal found 8/24![Delta logo]()
$374
This United Airlines deal was found by Cheapflights users on 8/23. 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 9/102:26 pm -
1 stop5h 12m
Tue 9/1511:15 am -
2 stops11h 15m
Deal found 8/23![United Airlines logo]()
$379
This United Airlines deal was found by Cheapflights users on 8/23. 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 9/122:26 pm -
1 stop7h 19m
Mon 9/212:32 pm -
1 stop7h 58m
Deal found 8/23![United Airlines logo]()
$447
This Expedia deal was found by Cheapflights users on 8/26. 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 9/155:18 pm -
1 stop20h 03m
Thu 10/154:42 pm -
1 stop25h 07m
Deal found 8/26![Alaska Airlines logo]()
$494
One-way flights from Helena to IllinoisSearch for one-way flight options from Helena to Illinois. Find affordable one-way fares based on user searches. Data last updated August 27, 2026.
Search for one-way flight options from Helena to Illinois. Find affordable one-way fares based on user searches. Data last updated August 27, 2026.
This Expedia deal was found by Cheapflights users on 8/23. 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 10/65:26 pm -
1 stop11h 14m
Deal found 8/23![Alaska Airlines logo]()
$205
This Expedia deal was found by Cheapflights users on 8/26. 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.
Sat 9/265:18 pm -
1 stop20h 03m
Deal found 8/26![Alaska Airlines logo]()
$250
This Alaska Airlines deal was found by Cheapflights users on 8/26. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/305:18 pm -
1 stop17h 49m
Deal found 8/26![Alaska Airlines logo]()
$307
This Delta deal was found by Cheapflights users on 8/24. 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.
Sun 10/111:08 pm -
1 stop7h 57m
Deal found 8/24![Delta logo]()
$329
This Alaska Airlines deal was found by Cheapflights users on 8/24. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/125:26 pm -
1 stop11h 14m
Deal found 8/24![Alaska Airlines logo]()
$347
This Delta deal was found by Cheapflights users on 8/24. 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 10/91:08 pm -
1 stop7h 57m
Deal found 8/24![Delta logo]()
$360
This Delta deal was found by Cheapflights users on 8/23. 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 10/67:15 am -
2 stops8h 32m
Deal found 8/23![Delta logo]()
$365
This United Airlines deal was found by Cheapflights users on 8/24. 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 10/82:30 pm -
1 stop8h 29m
Deal found 8/24![United Airlines logo]()
$370
This United Airlines deal was found by Cheapflights users on 8/24. 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 9/102:26 pm -
1 stop5h 35m
Deal found 8/24![United Airlines logo]()
$384
This Delta deal was found by Cheapflights users on 8/24. 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 10/91:08 pm -
2 stops32h 25m
Deal found 8/24![Delta logo]()
$393
This Delta deal was found by Cheapflights users on 8/24. 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 10/121:08 pm -
2 stops26h 39m
Deal found 8/24![Delta logo]()
$429
This United Airlines deal was found by Cheapflights users on 8/24. 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 10/96:25 am -
2 stops13h 15m
Deal found 8/24![United Airlines logo]()
$459
Find flight deals from Helena to Illinois
Keep the following information in mind while searching for Helena to Illinois flight deals. Data was last updated August 27, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $369 (Alaska Airlines) |
One-way from | $205 (Expedia) |
Cheapflights Fare Finder
Customize your flight search to find flights from Helena 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 August 27, 2026.
Use the filters below to find and compare flights from Helena to Illinois that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
HelenaSt. Louis
HLN Helena - STL Lambert-St Louis
HLNSTL
Helena
Tue 11/10
4:41 pm-2:25 pm
1 stop20h 44m
Lambert-St Louis
Fri 11/13
7:00 am-4:04 pm
1 stop10h 04m
$369
HelenaSt. Louis
HLN Helena - STL Lambert-St Louis
HLNSTL
Helena
Thu 9/10
2:26 pm-11:31 pm
1 stop8h 05m
Lambert-St Louis
Tue 9/15
4:40 pm-9:30 pm
1 stop5h 50m
$374
HelenaSt. Louis
HLN Helena - STL Lambert-St Louis
HLNSTL
Helena
Sat 9/12
12:57 pm-11:42 pm
2 stops9h 45m
Lambert-St Louis
Sat 9/19
5:00 pm-10:29 pm
1 stop6h 29m
$379
HelenaSt. Louis
HLN Helena - STL Lambert-St Louis
HLNSTL
Helena
Thu 9/10
12:57 pm-11:42 pm
2 stops9h 45m
Lambert-St Louis
Wed 9/16
8:00 am-12:17 pm
1 stop5h 17m
$414
HelenaChicago
HLN Helena - ORD Chicago O'Hare Intl
HLNORD
Helena
Sun 9/6
5:40 am-11:59 am
1 stop5h 19m
Chicago O'Hare Intl
Thu 9/10
1:55 pm-10:24 pm
2 stops9h 29m
$414
HelenaMoline
HLN Helena - MLI Moline Quad-City
HLNMLI
Helena
Sat 2/6
2:30 pm-9:03 pm
1 stop5h 33m
Moline Quad-City
Tue 2/9
2:26 pm-8:59 pm
2 stops7h 33m
$424
Quickest round-trip
HelenaSt. Louis
HLN Helena - STL Lambert-St Louis
HLNSTL
Helena
Sat 11/7
2:23 pm-8:59 pm
1 stop5h 36m
Lambert-St Louis
Tue 11/10
4:39 pm-9:31 pm
1 stop5h 52m
$429
HelenaChicago
HLN Helena - ORD Chicago O'Hare Intl
HLNORD
Helena
Sat 1/23
2:30 pm-11:19 pm
1 stop7h 49m
Chicago O'Hare Intl
Wed 1/27
2:18 pm-8:59 pm
1 stop7h 41m
$429
HelenaChicago
HLN Helena - ORD Chicago O'Hare Intl
HLNORD
Helena
Sat 9/12
2:26 pm-10:45 pm
1 stop7h 19m
Chicago O'Hare Intl
Mon 9/21
2:32 pm-9:30 pm
1 stop7h 58m
$447
HelenaChicago
HLN Helena - MDW Chicago Midway
HLNMDW
Helena
Sun 9/6
5:40 am-3:57 pm
2 stops9h 17m
Chicago Midway
Thu 9/10
2:00 pm-10:24 pm
2 stops9h 24m
$454
Showing 1-10 of 35 resultsSorted by cheapest first
Best time to book a flight from Helena to Illinois
Have a flexible travel schedule? Discover the best time to fly to Illinois from Helena with our price prediction graph.
HLN-STL
HLN-MLI
HLN-ORD
HLN-MDW
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 Helena to Illinois
HLN-USIL
HLN-STL
HLN-MLI
HLN-ORD
HLN-MDW
No data available for this route at this time. Please check back soon.
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 August 27, 2026.
Read reviews from past customers who have flown United Airlines from Helena to Illinois. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Boarding
7.7
Crew
8.1
Overall
7.4
Comfort
7.3
Entertainment
7.1
Food
6.7
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
Boarding
7.7
Crew
8.1
Overall
7.4
Comfort
7.3
Entertainment
7.1
Food
6.7
Reviews
1 / 20
4.0
OkayChris,Aug 2026
MIA - ORD
Related info for your journey
Find useful and relevant information for your journey from Helena 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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