Missoula

$156+ 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 6/1. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MSO
Jun 12 — Jun 191
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Cheap flight deals from Ontario to Missoula

Cheapest flights from Ontario to Missoula
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 May 13, 2026.

This Delta deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” 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 6/29:50 am
ONT
-
MSO
1 stop6h 34m
Delta
Tue 6/95:31 am
MSO
-
ONT
1 stop4h 19m
Delta
Deal found 5/12$311
This Alaska Airlines deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” 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 6/36:00 am
ONT
-
MSO
1 stop5h 16m
Alaska Airlines
Thu 6/48:02 pm
MSO
-
ONT
1 stop4h 56m
Alaska Airlines
Deal found 5/8$330
This Alaska Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” 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 6/54:03 pm
ONT
-
MSO
1 stop6h 56m
Alaska Airlines
Wed 6/107:03 am
MSO
-
ONT
1 stop5h 11m
Alaska Airlines
Deal found 5/12$355
This Delta deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” 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 8/106:00 am
ONT
-
MSO
1 stop5h 33m
Delta
Sat 8/157:13 am
MSO
-
ONT
1 stop5h 52m
Delta
Deal found 5/8$361
This Delta deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” 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 8/266:20 am
ONT
-
MSO
2 stops10h 27m
Delta
Sun 8/305:30 am
MSO
-
ONT
1 stop4h 18m
Delta
Deal found 5/11$366
This Alaska Airlines deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” 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 6/165:26 pm
ONT
-
MSO
1 stop5h 30m
Alaska Airlines
Tue 6/235:00 pm
MSO
-
ONT
1 stop7h 11m
Alaska Airlines
Deal found 5/11$386
This Delta deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” 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 5/319:50 am
ONT
-
MSO
1 stop6h 34m
Delta
Fri 6/55:30 am
MSO
-
ONT
1 stop4h 23m
Delta
Deal found 5/9$399
This Alaska Airlines deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” 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 5/294:03 pm
ONT
-
MSO
1 stop6h 56m
Alaska Airlines
Sun 5/318:02 pm
MSO
-
ONT
1 stop4h 56m
Alaska Airlines
Deal found 5/8$404
This Alaska Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” 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 6/165:26 pm
ONT
-
MSO
1 stop5h 30m
Alaska Airlines
Thu 6/185:41 pm
MSO
-
ONT
1 stop7h 10m
Alaska Airlines
Deal found 5/12$411
This Alaska Airlines deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” 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 5/317:00 am
ONT
-
MSO
1 stop5h 23m
Alaska Airlines
Fri 6/512:56 pm
MSO
-
ONT
2 stops23h 14m
Alaska Airlines
Deal found 5/9$441
This United Airlines deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” 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 5/255:00 am
ONT
-
MSO
1 stop7h 24m
United Airlines
Fri 5/296:15 am
MSO
-
ONT
1 stop7h 32m
United Airlines
Deal found 5/9$451

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 May 13, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$311
(Delta)

One-way from

$156
(Delta)

Popular in

December

Cheapest in

October

Average price

$408
Provider with most accurate pricing for Ontario-Missoula Johnson-Bell Field flight deals.
Provider most trusted by Cheapflights users for Ontario-Missoula Johnson-Bell Field flights.
From Ontario to Missoula Johnson-Bell Field
One-way flight from Ontario to Missoula Johnson-Bell Field
Highest demand for flights based on searches. 8% potential increase in price ($36 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($15 potential savings vs. average RT price).
Average for round-trip flights in May 2026

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 May 13, 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

Price

Cheapest round-trip

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Sat 9/19

7:10 am-1:25 pm

1 stop5h 15m

Missoula Johnson-Bell Field

Mon 9/28

4:13 pm-11:24 pm

1 stop8h 11m

$386

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Tue 6/16

5:26 pm-11:56 pm

1 stop5h 30m

Missoula Johnson-Bell Field

Sat 6/20

5:41 pm-11:51 pm

1 stop7h 10m

$461

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Sun 6/14

5:21 pm-12:28 am

1 stop6h 07m

Missoula Johnson-Bell Field

Fri 6/19

5:31 am-8:50 am

1 stop4h 19m

$468

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Wed 6/3

7:00 am-11:59 pm

2 stops15h 59m

Missoula Johnson-Bell Field

Thu 6/4

8:02 pm-11:58 pm

1 stop4h 56m

$478

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Sun 6/7

4:03 pm-11:59 pm

1 stop6h 56m

Missoula Johnson-Bell Field

Sun 6/14

7:03 am-11:11 am

1 stop5h 08m

$497

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Fri 6/12

2:05 pm-11:56 pm

1 stop8h 51m

Missoula Johnson-Bell Field

Tue 6/16

5:00 pm-11:11 pm

1 stop7h 11m

$513

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Tue 7/21

2:05 pm-10:55 pm

1 stop7h 50m

Missoula Johnson-Bell Field

Wed 7/29

7:00 am-1:09 pm

1 stop7h 09m

$515

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Mon 6/29

5:26 pm-11:56 pm

1 stop5h 30m

Missoula Johnson-Bell Field

Mon 7/6

5:41 pm-11:51 pm

1 stop7h 10m

$515
Quickest round-trip

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Mon 8/3

10:54 am-5:01 pm

1 stop5h 07m

Missoula Johnson-Bell Field

Sat 8/8

7:00 am-11:14 am

1 stop5h 14m

$515

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Tue 6/23

5:26 pm-11:56 pm

1 stop5h 30m

Missoula Johnson-Bell Field

Fri 6/26

7:03 am-11:14 am

1 stop5h 11m

$515

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/10

Showing 1-10 of 21 resultsSorted by cheapest first
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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 May.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • 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.
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 $275). Flying from Ontario to Missoula in December is currently the most expensive (average of $563). 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?

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 May 13, 2026.
Peruse reviews from past customers who have flown with Alaska Airlines and Delta 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.

Comfort

7.8

Food

7.0

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Franzi,Mar 2026

SFO - PDX

I love flying with Alaska. I think they sre the best airline.

Comfort

7.8

Food

7.0

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Franzi,Mar 2026

SFO - PDX

I love flying with Alaska. I think they sre the best airline.

Comfort

7.8

Food

7.0

Overall

7.9

Crew

8.5

Boarding

8.1

Entertainment

7.0

Reviews

1 / 20
10.0
Excellent

Franzi,Mar 2026

SFO - PDX

I love flying with Alaska. I think they sre the best airline.

Related info for your journey

Find useful and relevant information for your journey from Ontario to Missoula. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • How long is the flight from Ontario to Missoula?

    Delta and Alaska Airlines can get you from Ontario to Missoula in just under 5h 15m. Your travel time can differ by up to 5h 12m. Airlines will cover a distance of 907 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Ontario to Missoula round-trip?

    Alaska Airlines, at $182, was found to be the cheapest airline from Ontario to Missoula. An alternate airline flying to your destination would be Delta. Alaska Airlines is priced at 55% lower than the current average price of a flight leaving 3 months from now.

  • Can I find deals for flights from Ontario to Missoula that include hotel bookings?

    Yes. In addition to deals on Ontario to Missoula flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Ontario to Missoula?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Ontario to Missoula.

  • Can I find deals for business class flights from Ontario to Missoula?

    Yes. Cheapflights offers flight deals from Ontario to Missoula by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • 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 $275). Flying from Ontario to Missoula in December is currently the most expensive (average of $563). 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.

See more FAQs

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Alternative routes for Ontario to Missoula

See prices for flight routes from nearby airports that may be better suited for you.

Top 2 airlines flying from Ontario to Missoula

Discover the top 2 airlines that operate flights from Ontario to Missoula. 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 2,558,603 searches. Data last updated May 13, 2026.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$182Average$408FlexibilityNo cancel feeOn-time75%
DeltaCheapest$240Average$364FlexibilityNo cancel feeOn-timeN/A

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