$122+ Cheap flights from Illinois to Great Falls (GTF)
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 5/23. Fares are subject to change and may not be available on all flights or dates of travel.
ORD — GTF
Mar 6 — Mar 131
1 adult, Economy
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Find cheap flights from Illinois to Great Falls 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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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 Illinois to Great Falls
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Cheapest flights from Illinois to Great FallsExplore the most affordable flight options available from Illinois to Great Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 4, 2026.
Explore the most affordable flight options available from Illinois to Great Falls. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 4, 2026.
This Alaska Airlines deal was found by Cheapflights users on 2/2. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/108:00 am
ORD
- GTF
1 stop9h 26m
Alaska Airlines
Mon 4/135:06 pm
GTF
- ORD
1 stop12h 33m
Alaska Airlines
Deal found 2/2![Alaska Airlines logo]()
$244
This United Airlines deal was found by Cheapflights users on 2/2. 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.
Wed 3/112:50 pm
STL
- GTF
1 stop7h 21m
United Airlines
Wed 3/182:30 pm
GTF
- STL
1 stop5h 11m
United Airlines
Deal found 2/2![United Airlines logo]()
$278
This Delta deal was found by Cheapflights users on 2/2. 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.
Wed 3/116:32 am
STL
- GTF
2 stops12h 10m
Delta
Wed 3/186:22 pm
GTF
- STL
1 stop4h 59m
Delta
Deal found 2/2![Delta logo]()
$284
This United Airlines deal was found by Cheapflights users on 2/1. 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 4/284:30 pm
STL
- GTF
1 stop5h 47m
United Airlines
Sat 5/26:15 am
GTF
- STL
1 stop7h 13m
United Airlines
Deal found 2/1![United Airlines logo]()
$303
This United Airlines deal was found by Cheapflights users on 2/3. 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 8/16:00 am
ORD
- GTF
1 stop8h 33m
United Airlines
Sat 8/82:29 pm
GTF
- ORD
1 stop7h 50m
United Airlines
Deal found 2/3![United Airlines logo]()
$310
This Delta deal was found by Cheapflights users on 2/2. 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 5/297:45 am
ORD
- GTF
1 stop5h 42m
Delta
Tue 6/21:07 pm
GTF
- ORD
1 stop7h 43m
Delta
Deal found 2/2![Delta logo]()
$316
This Alaska Airlines deal was found by Cheapflights users on 2/2. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/187:00 am
STL
- GTF
1 stop11h 48m
Alaska Airlines
Fri 2/204:57 pm
GTF
- STL
1 stop19h 54m
Alaska Airlines
Deal found 2/2![Alaska Airlines logo]()
$328
This Delta deal was found by Cheapflights users on 2/2. 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.
Sat 9/196:45 am
STL
- GTF
2 stops11h 54m
Delta
Fri 9/256:20 pm
GTF
- STL
1 stop5h 16m
Delta
Deal found 2/2![Delta logo]()
$339
This Delta deal was found by Cheapflights users on 2/2. 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.
Sun 8/308:50 am
STL
- GTF
2 stops9h 49m
Delta
Wed 9/96:20 pm
GTF
- STL
2 stops12h 46m
Delta
Deal found 2/2![Delta logo]()
$344
This United Airlines deal was found by Cheapflights users on 2/2. 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.
Mon 2/234:30 pm
STL
- GTF
1 stop6h 03m
United Airlines
Wed 2/252:25 pm
GTF
- STL
1 stop5h 01m
United Airlines
Deal found 2/2![United Airlines logo]()
$346
This Delta deal was found by Cheapflights users on 2/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/111:10 am
ORD
- GTF
2 stops12h 34m
Delta
Sat 8/86:20 pm
GTF
- ORD
2 stops12h 06m
Delta
Deal found 2/3![Delta logo]()
$357
This Alaska Airlines deal was found by Cheapflights users on 2/1. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/65:39 pm
ORD
- GTF
1 stop25h 36m
Alaska Airlines
Mon 8/106:55 pm
GTF
- ORD
1 stop10h 25m
Alaska Airlines
Deal found 2/1![Alaska Airlines logo]()
$375
Best flights from Illinois to Great FallsDiscover carefully curated flight deals from Illinois to Great Falls that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 4, 2026.
Discover carefully curated flight deals from Illinois to Great Falls that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 4, 2026.
This Alaska Airlines deal was found by Cheapflights users on 2/2. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/108:00 am
ORD
- GTF
1 stop9h 26m
Alaska Airlines
Mon 4/135:06 pm
GTF
- ORD
1 stop12h 33m
Alaska Airlines
Deal found 2/2![Alaska Airlines logo]()
$244
This United Airlines deal was found by Cheapflights users on 2/2. 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.
Wed 3/112:50 pm
STL
- GTF
1 stop7h 21m
United Airlines
Wed 3/182:30 pm
GTF
- STL
1 stop5h 11m
United Airlines
Deal found 2/2![United Airlines logo]()
$278
This Delta deal was found by Cheapflights users on 2/2. 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.
Wed 3/116:32 am
STL
- GTF
2 stops12h 10m
Delta
Wed 3/186:22 pm
GTF
- STL
1 stop4h 59m
Delta
Deal found 2/2![Delta logo]()
$284
This United Airlines deal was found by Cheapflights users on 2/1. 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 4/284:30 pm
STL
- GTF
1 stop5h 47m
United Airlines
Sat 5/26:15 am
GTF
- STL
1 stop7h 13m
United Airlines
Deal found 2/1![United Airlines logo]()
$303
This Delta deal was found by Cheapflights users on 2/2. 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 5/297:45 am
ORD
- GTF
1 stop5h 42m
Delta
Tue 6/21:07 pm
GTF
- ORD
1 stop7h 43m
Delta
Deal found 2/2![Delta logo]()
$316
This Alaska Airlines deal was found by Cheapflights users on 2/2. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/187:00 am
STL
- GTF
1 stop11h 48m
Alaska Airlines
Fri 2/204:57 pm
GTF
- STL
1 stop19h 54m
Alaska Airlines
Deal found 2/2![Alaska Airlines logo]()
$328
This United Airlines deal was found by Cheapflights users on 2/3. 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 8/16:00 am
ORD
- GTF
1 stop8h 33m
United Airlines
Sat 8/82:29 pm
GTF
- ORD
1 stop7h 50m
United Airlines
Deal found 2/3![United Airlines logo]()
$310
This Delta deal was found by Cheapflights users on 2/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/111:10 am
ORD
- GTF
2 stops12h 34m
Delta
Sat 8/86:20 pm
GTF
- ORD
2 stops12h 06m
Delta
Deal found 2/3![Delta logo]()
$357
This United Airlines deal was found by Cheapflights users on 2/2. 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.
Mon 2/234:30 pm
STL
- GTF
1 stop6h 03m
United Airlines
Wed 2/252:25 pm
GTF
- STL
1 stop5h 01m
United Airlines
Deal found 2/2![United Airlines logo]()
$346
This Delta deal was found by Cheapflights users on 2/2. 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 2/177:15 am
ORD
- GTF
1 stop6h 15m
Delta
Sat 2/211:15 pm
GTF
- ORD
1 stop7h 37m
Delta
Deal found 2/2![Delta logo]()
$416
This United Airlines deal was found by Cheapflights users on 2/3. 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.
Thu 2/199:00 am
PIA
- GTF
1 stop5h 43m
United Airlines
Mon 2/232:25 pm
GTF
- PIA
2 stops21h 18m
United Airlines
Deal found 2/3![United Airlines logo]()
$628
This Delta deal was found by Cheapflights users on 2/2. 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 5/291:22 pm
MDW
- GTF
2 stops10h 04m
Delta
Tue 6/25:40 am
GTF
- MDW
2 stops11h 34m
Delta
Deal found 2/2![Delta logo]()
$679
This United Airlines deal was found by Cheapflights users on 2/3. 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 2/285:45 pm
PIA
- GTF
2 stops28h 48m
United Airlines
Wed 3/42:25 pm
GTF
- PIA
2 stops21h 18m
United Airlines
Deal found 2/3![United Airlines logo]()
$742
This Delta deal was found by Cheapflights users on 2/2. 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 2/176:00 am
MDW
- GTF
2 stops12h 33m
Delta
Sat 2/215:20 am
GTF
- MDW
2 stops9h 54m
Delta
Deal found 2/2![Delta logo]()
$769
Last-minute flights from Illinois to Great FallsDiscover last-minute flight deals from Illinois to Great Falls. Data last updated February 4, 2026 and is based on user searches.
Discover last-minute flight deals from Illinois to Great Falls. Data last updated February 4, 2026 and is based on user searches.
This Alaska Airlines deal was found by Cheapflights users on 2/3. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/167:00 am
ORD
- GTF
1 stop10h 17m
Alaska Airlines
Thu 2/194:57 pm
GTF
- ORD
1 stop29h 59m
Alaska Airlines
Deal found 2/3![Alaska Airlines logo]()
$795
This Delta deal was found by Cheapflights users on 2/2. 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 2/177:00 am
STL
- GTF
1 stop6h 30m
Delta
Sat 2/211:15 pm
GTF
- STL
1 stop7h 23m
Delta
Deal found 2/2![Delta logo]()
$388
This Delta deal was found by Cheapflights users on 2/2. 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 2/177:15 am
ORD
- GTF
1 stop6h 15m
Delta
Sat 2/211:15 pm
GTF
- ORD
1 stop7h 37m
Delta
Deal found 2/2![Delta logo]()
$416
This Delta deal was found by Cheapflights users on 2/2. 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 2/176:00 am
MDW
- GTF
2 stops12h 33m
Delta
Sat 2/215:20 am
GTF
- MDW
2 stops9h 54m
Delta
Deal found 2/2![Delta logo]()
$769
This Alaska Airlines deal was found by Cheapflights users on 2/2. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/187:00 am
STL
- GTF
1 stop11h 48m
Alaska Airlines
Fri 2/204:57 pm
GTF
- STL
1 stop19h 54m
Alaska Airlines
Deal found 2/2![Alaska Airlines logo]()
$328
This United Airlines deal was found by Cheapflights users on 2/2. 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.
Wed 2/188:30 am
STL
- GTF
2 stops14h 03m
United Airlines
Fri 2/202:25 pm
GTF
- STL
1 stop5h 01m
United Airlines
Deal found 2/2![United Airlines logo]()
$432
This Alaska Airlines deal was found by Cheapflights users on 2/3. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/192:47 pm
STL
- GTF
1 stop26h 30m
Alaska Airlines
Mon 2/234:57 pm
GTF
- STL
1 stop19h 54m
Alaska Airlines
Deal found 2/3![Alaska Airlines logo]()
$443
This United Airlines deal was found by Cheapflights users on 2/3. 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.
Thu 2/199:00 am
PIA
- GTF
1 stop5h 43m
United Airlines
Mon 2/232:25 pm
GTF
- PIA
2 stops21h 18m
United Airlines
Deal found 2/3![United Airlines logo]()
$628
This United Airlines deal was found by Cheapflights users on 2/2. 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.
Mon 2/234:30 pm
STL
- GTF
1 stop6h 03m
United Airlines
Wed 2/252:25 pm
GTF
- STL
1 stop5h 01m
United Airlines
Deal found 2/2![United Airlines logo]()
$346
This United Airlines deal was found by Cheapflights users on 2/3. 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 2/285:45 pm
PIA
- GTF
2 stops28h 48m
United Airlines
Wed 3/42:25 pm
GTF
- PIA
2 stops21h 18m
United Airlines
Deal found 2/3![United Airlines logo]()
$742
This United Airlines deal was found by Cheapflights users on 2/2. 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.
Wed 3/112:50 pm
STL
- GTF
1 stop7h 21m
United Airlines
Wed 3/182:30 pm
GTF
- STL
1 stop5h 11m
United Airlines
Deal found 2/2![United Airlines logo]()
$278
This Delta deal was found by Cheapflights users on 2/2. 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.
Wed 3/116:32 am
STL
- GTF
2 stops12h 10m
Delta
Wed 3/186:22 pm
GTF
- STL
1 stop4h 59m
Delta
Deal found 2/2![Delta logo]()
$284
One-way flights from Illinois to Great FallsSearch for one-way flight options from Illinois to Great Falls. Find affordable one-way fares based on user searches. Data last updated February 4, 2026.
Search for one-way flight options from Illinois to Great Falls. Find affordable one-way fares based on user searches. Data last updated February 4, 2026.
This Delta deal was found by Cheapflights users on 2/2. 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.
Sat 5/235:00 pm
ORD
- GTF
1 stop6h 26m
Delta
Deal found 2/2![Delta logo]()
$122
This Alaska Airlines deal was found by Cheapflights users on 2/2. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/235:29 pm
ORD
- GTF
1 stop23h 48m
Alaska Airlines
Deal found 2/2![Alaska Airlines logo]()
$168
This Delta deal was found by Cheapflights users on 2/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/145:15 pm
ORD
- GTF
1 stop6h 14m
Delta
Deal found 2/3![Delta logo]()
$214
This Alaska Airlines deal was found by Cheapflights users on 2/2. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/147:00 am
ORD
- GTF
1 stop11h 48m
Alaska Airlines
Deal found 2/2![Alaska Airlines logo]()
$220
This United Airlines deal was found by Cheapflights users on 2/2. 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.
Sat 5/238:40 am
ORD
- GTF
Nonstop3h 43m
United Airlines
Deal found 2/2![United Airlines logo]()
$249
This Kiwi.com deal was found by Cheapflights users on 2/2. 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.
Thu 7/168:53 pm
ORD
- GTF
1 stop13h 41m
Multiple Airlines
Deal found 2/2![Multiple Airlines logo]()
$254
This Kiwi.com deal was found by Cheapflights users on 2/3. 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.
Sat 2/144:29 pm
ORD
- GTF
2 stops42h 23m
Multiple Airlines
Deal found 2/3![Multiple Airlines logo]()
$265
This Delta deal was found by Cheapflights users on 2/1. 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.
Mon 2/231:28 pm
MDW
- GTF
2 stops10h 01m
Delta
Deal found 2/1![Delta logo]()
$280
This Delta deal was found by Cheapflights users on 2/3. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 2/1411:06 am
MDW
- GTF
2 stops12h 23m
Delta
Deal found 2/3![Delta logo]()
$740
Find flight deals from Illinois to Great Falls
Keep the following information in mind while searching for Illinois to Great Falls flight deals. Data was last updated February 4, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $244 (Alaska Airlines) |
One-way from | $122 (Delta) |
Popular in | January |
Cheapest in | December |
Average price | $324 |
Cheapflights Fare Finder
Customize your flight search to find flights from Illinois to Great Falls 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 2,558,603 searches. Data last updated February 4, 2026.
Use the filters below to find and compare flights from Illinois to Great Falls that are best for you.
Fly from
Illinois
Fly to
Great Falls
Route
Depart
Return
Price
ChicagoGreat Falls
ORD - GTF
ORDGTF
Chicago O'Hare Intl
Fri 4/10
8:00 am-4:26 pm
1 stop9h 26m
Great Falls
Mon 4/13
5:06 pm-6:39 am
1 stop12h 33m
$244
St. LouisGreat Falls
STL - GTF
STLGTF
Lambert-St Louis
Wed 3/11
2:50 pm-9:11 pm
1 stop7h 21m
Great Falls
Wed 3/18
2:30 pm-8:41 pm
1 stop5h 11m
$278
St. LouisGreat Falls
STL - GTF
STLGTF
Lambert-St Louis
Wed 3/11
6:32 am-5:42 pm
2 stops12h 10m
Great Falls
Wed 3/18
6:22 pm-12:21 am
1 stop4h 59m
$284
St. LouisGreat Falls
STL - GTF
STLGTF
Lambert-St Louis
Tue 4/28
4:30 pm-9:17 pm
1 stop5h 47m
Great Falls
Sat 5/2
6:15 am-2:28 pm
1 stop7h 13m
$303
ChicagoGreat Falls
ORD - GTF
ORDGTF
Chicago O'Hare Intl
Sat 8/1
6:00 am-1:33 pm
1 stop8h 33m
Great Falls
Sat 8/8
2:29 pm-11:19 pm
1 stop7h 50m
$310
ChicagoGreat Falls
ORD - GTF
ORDGTF
Chicago O'Hare Intl
Fri 5/29
7:45 am-12:27 pm
1 stop5h 42m
Great Falls
Tue 6/2
1:07 pm-9:50 pm
1 stop7h 43m
$316
St. LouisGreat Falls
STL - GTF
STLGTF
Lambert-St Louis
Wed 2/18
7:00 am-5:48 pm
1 stop11h 48m
Great Falls
Fri 2/20
4:57 pm-1:51 pm
1 stop19h 54m
$328
St. LouisGreat Falls
STL - GTF
STLGTF
Lambert-St Louis
Mon 2/23
4:30 pm-9:33 pm
1 stop6h 03m
Great Falls
Wed 2/25
2:25 pm-8:26 pm
1 stop5h 01m
$346
ChicagoGreat Falls
ORD - GTF
ORDGTF
Chicago O'Hare Intl
Sat 8/1
11:10 am-10:44 pm
2 stops12h 34m
Great Falls
Sat 8/8
6:20 pm-7:26 am
2 stops12h 06m
$357
ChicagoGreat Falls
ORD - GTF
ORDGTF
Chicago O'Hare Intl
Tue 2/17
7:15 am-12:30 pm
1 stop6h 15m
Great Falls
Sat 2/21
1:15 pm-9:52 pm
1 stop7h 37m
$416
Showing 1-10 of 23 results
Best time to book a flight from Illinois to Great Falls
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STL-GTF
ORD-GTF
PIA-GTF
MDW-GTF
Estimated round-trip price
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Everything you need to know about your flight from Illinois to Great Falls
USIL-GTF
STL-GTF
ORD-GTF
PIA-GTF
MDW-GTF
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| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$248 | Average$498 | FlexibilityNo cancel fee | On-time69% |