$143+ Cheap flights from Ontario to Missoula (ONT - MSO)
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 8/5. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MSO
Aug 25 — Sep 11
Round-trip
1 adult, Economy
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Find cheap flights from Ontario to Missoula with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Ontario to Missoula
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Best
Last-minute
One-way
Cheapest flights from Ontario to MissoulaExplore the most affordable flight options available from Ontario to Missoula. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 26, 2026.
Explore the most affordable flight options available from Ontario to Missoula. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 26, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/25. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/23:40 pm
ONT
- MSO
1 stop28h 19m
Multiple Airlines
Thu 9/109:49 pm
MSO
- ONT
1 stop14h 33m
Multiple Airlines
Deal found 7/25![Multiple Airlines logo]()
$302
This Priceline deal was found by Cheapflights users on 7/21. 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.
Fri 9/257:12 am
ONT
- MSO
1 stop5h 13m
Alaska Airlines
Sun 9/277:00 am
MSO
- ONT
1 stop5h 16m
Alaska Airlines
Deal found 7/21![Alaska Airlines logo]()
$419
This Kiwi.com deal was found by Cheapflights users on 7/21. 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.
Sun 8/1610:49 am
ONT
- MSO
2 stops25h 12m
Multiple Airlines
Thu 8/209:52 pm
MSO
- ONT
1 stop11h 11m
Multiple Airlines
Deal found 7/21![Multiple Airlines logo]()
$423
This Delta deal was found by Cheapflights users on 7/21. 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 8/295:05 pm
ONT
- MSO
1 stop5h 07m
Delta
Wed 9/96:17 pm
MSO
- ONT
1 stop4h 47m
Delta
Deal found 7/21![Delta logo]()
$429
This Alaska Airlines deal was found by Cheapflights users on 7/21. 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 11/77:15 am
ONT
- MSO
1 stop5h 00m
Alaska Airlines
Wed 11/117:00 am
MSO
- ONT
2 stops11h 51m
Alaska Airlines
Deal found 7/21![Alaska Airlines logo]()
$436
This Alaska Airlines deal was found by Cheapflights users on 7/23. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/297:12 am
ONT
- MSO
2 stops14h 47m
Alaska Airlines
Tue 9/11:04 pm
MSO
- ONT
1 stop5h 06m
Alaska Airlines
Deal found 7/23![Alaska Airlines logo]()
$451
This Alaska Airlines deal was found by Cheapflights users on 7/21. 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 9/57:12 am
ONT
- MSO
2 stops14h 49m
Alaska Airlines
Sat 9/127:00 am
MSO
- ONT
2 stops11h 18m
Alaska Airlines
Deal found 7/21![Alaska Airlines logo]()
$453
This Trip.com deal was found by Cheapflights users on 7/21. 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.
Fri 8/283:07 pm
ONT
- MSO
1 stop6h 52m
Alaska Airlines
Mon 8/317:15 am
MSO
- ONT
1 stop7h 54m
Alaska Airlines
Deal found 7/21![Alaska Airlines logo]()
$454
This United Airlines deal was found by Cheapflights users on 7/21. 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 8/165:00 am
ONT
- MSO
1 stop7h 38m
United Airlines
Sat 8/224:11 pm
MSO
- ONT
1 stop4h 50m
United Airlines
Deal found 7/21![United Airlines logo]()
$459
Best flights from Ontario to MissoulaDiscover carefully curated flight deals from Ontario to Missoula that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 26, 2026.
Discover carefully curated flight deals from Ontario to Missoula that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated July 26, 2026.
This Alaska Airlines deal was found by Cheapflights users on 7/20. 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 11/77:15 am
ONT
- MSO
1 stop5h 00m
Alaska Airlines
Wed 11/114:22 pm
MSO
- ONT
1 stop7h 32m
Alaska Airlines
Deal found 7/20![Alaska Airlines logo]()
$419
This Delta deal was found by Cheapflights users on 7/21. 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 8/239:43 am
ONT
- MSO
1 stop7h 04m
Delta
Wed 8/266:27 pm
MSO
- ONT
1 stop6h 07m
Delta
Deal found 7/21![Delta logo]()
$429
This United Airlines deal was found by Cheapflights users on 7/23. 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 8/295:00 am
ONT
- MSO
1 stop7h 38m
United Airlines
Tue 9/14:11 pm
MSO
- ONT
1 stop4h 50m
United Airlines
Deal found 7/23![United Airlines logo]()
$509
This Delta deal was found by Cheapflights users on 7/21. 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 8/295:05 pm
ONT
- MSO
1 stop5h 07m
Delta
Wed 9/96:17 pm
MSO
- ONT
1 stop4h 47m
Delta
Deal found 7/21![Delta logo]()
$429
This Delta deal was found by Cheapflights users on 7/21. 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 9/15:05 pm
ONT
- MSO
1 stop5h 07m
Delta
Wed 9/96:17 pm
MSO
- ONT
1 stop4h 47m
Delta
Deal found 7/21![Delta logo]()
$429
This Alaska Airlines deal was found by Cheapflights users on 7/23. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/306:02 am
ONT
- MSO
1 stop5h 21m
Alaska Airlines
Tue 9/17:15 am
MSO
- ONT
1 stop7h 54m
Alaska Airlines
Deal found 7/23![Alaska Airlines logo]()
$477
This Alaska Airlines deal was found by Cheapflights users on 7/25. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/213:07 pm
ONT
- MSO
1 stop6h 52m
Alaska Airlines
Tue 8/257:15 am
MSO
- ONT
2 stops14h 09m
Alaska Airlines
Deal found 7/25![Alaska Airlines logo]()
$511
This Delta deal was found by Cheapflights users on 7/24. 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 8/145:05 pm
ONT
- MSO
1 stop6h 13m
Delta
Fri 8/215:30 am
MSO
- ONT
1 stop4h 22m
Delta
Deal found 7/24![Delta logo]()
$519
This Delta deal was found by Cheapflights users on 7/23. 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.
Sun 8/309:43 am
ONT
- MSO
1 stop7h 04m
Delta
Mon 8/311:16 pm
MSO
- ONT
1 stop4h 08m
Delta
Deal found 7/23![Delta logo]()
$534
Last-minute flights from Ontario to MissoulaDiscover last-minute flight deals from Ontario to Missoula. Data last updated July 26, 2026 and is based on user searches.
Discover last-minute flight deals from Ontario to Missoula. Data last updated July 26, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 7/21. 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.
Sun 8/1610:49 am
ONT
- MSO
2 stops25h 12m
Multiple Airlines
Thu 8/209:52 pm
MSO
- ONT
1 stop11h 11m
Multiple Airlines
Deal found 7/21![Multiple Airlines logo]()
$423
This United Airlines deal was found by Cheapflights users on 7/21. 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 8/165:00 am
ONT
- MSO
1 stop7h 38m
United Airlines
Sat 8/224:11 pm
MSO
- ONT
1 stop4h 50m
United Airlines
Deal found 7/21![United Airlines logo]()
$459
This Alaska Airlines deal was found by Cheapflights users on 7/23. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/1812:04 pm
ONT
- MSO
1 stop9h 48m
Alaska Airlines
Mon 8/247:15 am
MSO
- ONT
1 stop7h 54m
Alaska Airlines
Deal found 7/23![Alaska Airlines logo]()
$469
This Booking.com deal was found by Cheapflights users on 7/20. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/2112:00 pm
ONT
- MSO
1 stop9h 59m
Alaska Airlines
Mon 8/247:15 am
MSO
- ONT
1 stop7h 54m
Alaska Airlines
Deal found 7/20![Alaska Airlines logo]()
$419
This Alaska Airlines deal was found by Cheapflights users on 7/21. 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 8/227:12 am
ONT
- MSO
2 stops14h 47m
Alaska Airlines
Mon 8/247:15 am
MSO
- ONT
1 stop7h 54m
Alaska Airlines
Deal found 7/21![Alaska Airlines logo]()
$446
This Expedia deal was found by Cheapflights users on 7/21. 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.
Mon 8/243:07 pm
ONT
- MSO
1 stop6h 52m
Alaska Airlines
Wed 8/267:15 am
MSO
- ONT
2 stops9h 55m
Alaska Airlines
Deal found 7/21![Alaska Airlines logo]()
$476
This Mytrip deal was found by Cheapflights users on 7/22. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/276:02 am
ONT
- MSO
1 stop8h 15m
Alaska Airlines
Fri 9/187:00 am
MSO
- ONT
2 stops10h 10m
Alaska Airlines
Deal found 7/22![Alaska Airlines logo]()
$471
This Trip.com deal was found by Cheapflights users on 7/21. 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.
Fri 8/283:07 pm
ONT
- MSO
1 stop6h 52m
Alaska Airlines
Mon 8/317:15 am
MSO
- ONT
1 stop7h 54m
Alaska Airlines
Deal found 7/21![Alaska Airlines logo]()
$454
This Delta deal was found by Cheapflights users on 7/22. 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.
Sat 8/295:05 pm
ONT
- MSO
1 stop5h 07m
Delta
Sat 9/56:27 pm
MSO
- ONT
1 stop4h 56m
Delta
Deal found 7/22![Delta logo]()
$429
This Alaska Airlines deal was found by Cheapflights users on 7/23. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/297:12 am
ONT
- MSO
2 stops14h 47m
Alaska Airlines
Tue 9/11:04 pm
MSO
- ONT
1 stop5h 06m
Alaska Airlines
Deal found 7/23![Alaska Airlines logo]()
$451
This Alaska Airlines deal was found by Cheapflights users on 7/23. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/306:02 am
ONT
- MSO
1 stop5h 21m
Alaska Airlines
Tue 9/17:15 am
MSO
- ONT
1 stop7h 54m
Alaska Airlines
Deal found 7/23![Alaska Airlines logo]()
$477
One-way flights from Ontario to MissoulaSearch for one-way flight options from Ontario to Missoula. Find affordable one-way fares based on user searches. Data last updated July 26, 2026.
Search for one-way flight options from Ontario to Missoula. Find affordable one-way fares based on user searches. Data last updated July 26, 2026.
This Kiwi.com deal was found by Cheapflights users on 7/20. 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 8/55:08 pm
ONT
- MSO
1 stop15h 26m
Multiple Airlines
Deal found 7/20![Multiple Airlines logo]()
$143
This Kiwi.com deal was found by Cheapflights users on 7/21. 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.
Sun 8/2311:15 am
ONT
- MSO
1 stop8h 47m
Multiple Airlines
Deal found 7/21![Multiple Airlines logo]()
$162
This Delta deal was found by Cheapflights users on 7/22. 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.
Sat 8/225:05 pm
ONT
- MSO
1 stop5h 07m
Delta
Deal found 7/22![Delta logo]()
$215
This Delta deal was found by Cheapflights users on 7/22. 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.
Fri 8/215:05 pm
ONT
- MSO
1 stop6h 13m
Delta
Deal found 7/22![Delta logo]()
$245
This Delta deal was found by Cheapflights users on 7/20. 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 8/75:05 pm
ONT
- MSO
1 stop6h 13m
Delta
Deal found 7/20![Delta logo]()
$250
This Kiwi.com deal was found by Cheapflights users on 7/20. 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 8/18:58 am
ONT
- MSO
2 stops28h 59m
Multiple Airlines
Deal found 7/20![Multiple Airlines logo]()
$259
This Gotogate deal was found by Cheapflights users on 7/23. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/87:12 am
ONT
- MSO
2 stops14h 49m
Alaska Airlines
Deal found 7/23![Alaska Airlines logo]()
$268
Find flight deals from Ontario to Missoula
Discover tips and strategies to find the most affordable flight options for your journey from Ontario (ONT) to Missoula (MSO). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated July 26, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $302 (Kiwi.com) |
One-way from | $143 (Kiwi.com) |
Popular in | July |
Cheapest in | October |
Average price | $668 |
Cheapflights Fare Finder
Customize your flight search to find flights from Ontario to Missoula 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 July 26, 2026.
Use the filters below to find and compare flights from Ontario to Missoula that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
OntarioMissoula
ONT - MSO
ONTMSO
Ontario
Sat 11/7
7:15 am-1:15 pm
1 stop5h 00m
Missoula Johnson-Bell Field
Wed 11/11
4:22 pm-10:54 pm
1 stop7h 32m
$419
OntarioMissoula
ONT - MSO
ONTMSO
Ontario
Sun 8/23
9:43 am-5:47 pm
1 stop7h 04m
Missoula Johnson-Bell Field
Wed 8/26
6:27 pm-11:34 pm
1 stop6h 07m
$429
Quickest round-trip
OntarioMissoula
ONT - MSO
ONTMSO
Ontario
Sat 8/29
5:05 pm-11:12 pm
1 stop5h 07m
Missoula Johnson-Bell Field
Wed 9/9
6:17 pm-10:04 pm
1 stop4h 47m
$429
OntarioMissoula
ONT - MSO
ONTMSO
Ontario
Tue 9/1
5:05 pm-11:12 pm
1 stop5h 07m
Missoula Johnson-Bell Field
Wed 9/9
6:17 pm-10:04 pm
1 stop4h 47m
$429
OntarioMissoula
ONT - MSO
ONTMSO
Ontario
Sun 8/30
6:02 am-12:23 pm
1 stop5h 21m
Missoula Johnson-Bell Field
Tue 9/1
7:15 am-2:09 pm
1 stop7h 54m
$477
OntarioMissoula
ONT - MSO
ONTMSO
Ontario
Sat 8/29
5:00 am-1:38 pm
1 stop7h 38m
Missoula Johnson-Bell Field
Tue 9/1
4:11 pm-8:01 pm
1 stop4h 50m
$509
OntarioMissoula
ONT - MSO
ONTMSO
Ontario
Fri 8/21
3:07 pm-10:59 pm
1 stop6h 52m
Missoula Johnson-Bell Field
Tue 8/25
7:15 am-8:24 pm
2 stops14h 09m
$511
OntarioMissoula
ONT - MSO
ONTMSO
Ontario
Fri 8/14
5:05 pm-12:18 am
1 stop6h 13m
Missoula Johnson-Bell Field
Fri 8/21
5:30 am-8:52 am
1 stop4h 22m
$519
OntarioMissoula
ONT - MSO
ONTMSO
Ontario
Sun 8/30
9:43 am-5:47 pm
1 stop7h 04m
Missoula Johnson-Bell Field
Mon 8/31
1:16 pm-4:24 pm
1 stop4h 08m
$534
Cheapest one-way
Quickest one-way
OntarioMissoula
ONT - MSO
ONTMSO
Ontario
Sat 8/22
5:05 pm-11:12 pm
1 stop5h 07m
$215
Showing 1-10 of 18 resultsSorted by cheapest first
Compare providers for flights from Ontario to Missoula
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Ontario to Missoula in July.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Ontario-Missoula flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Ontario-Missoula flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Ontario-Missoula flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Ontario-Missoula flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Ontario-Missoula flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Ontario to Missoula
Have a flexible travel schedule? Discover the best time to fly to Missoula from Ontario with our price prediction graph.
ONT-MSO
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 Ontario to Missoula
What is the cheapest month to book a flight from Ontario to Missoula?
Currently, October is the cheapest month in which you can book a flight from Ontario to Missoula (average of $260). Flying from Ontario to Missoula in July is currently the most expensive (average of $668). 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.
How much does it cost to fly round-trip from Ontario to Missoula?
Airfare is below average for this route at the moment.
Ontario to Missoula flights typically cost between $508 and $626 in September.The cheapest round-trip price found within the last 5 days was $302 on Multiple Airlines (Sep 2-Sep 10).
Reviews of airlines servicing Missoula
Get insights into the airlines that provide service to Missoula. 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 Missoula. Reviews last updated July 26, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines,Delta, andUnited Airlines from Ontario to Missoula to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Entertainment
7.0
Food
7.0
Overall
7.9
Comfort
7.8
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Entertainment
7.0
Food
7.0
Overall
7.9
Comfort
7.8
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Entertainment
7.0
Food
7.0
Overall
7.9
Comfort
7.8
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
Entertainment
7.0
Food
7.0
Overall
7.9
Comfort
7.8
Boarding
8.1
Crew
8.5
Reviews
1 / 20
10.0
ExcellentFranzi,Mar 2026
SFO - PDX
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Top 3 airlines flying from Ontario to Missoula
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| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$182 | Average$419 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$239 | Average$460 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$260 | Average$364 | FlexibilityNo cancel fee | On-timeN/A |