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$120+ Cheap flights from Missoula to Ontario (MSO - ONT)

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 8/13. Fares are subject to change and may not be available on all flights or dates of travel.
MSO — ONT
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
1 adult, Economy
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Cheap flight deals from Missoula to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Missoula (MSO) to Ontario (ONT). 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 3, 2025.

Round-trip from

$241
(Delta)

One-way from

$120
(Alaska Airlines)

Popular in

December

Cheapest in

August

Average price

$514
From Missoula Johnson-Bell Field to Ontario
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One-way flight from Missoula Johnson-Bell Field to Ontario
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Highest demand for flights based on searches. 26% potential increase in price ($147 potential increase over avg. RT price).
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Cheapest flight prices on average. 17% potential price decrease ($60 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Missoula to Ontario

Cheapest flights from Missoula to Ontario
Explore the most affordable flight options available from Missoula to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on July 3, 2025.

This Delta deal was found by Cheapflights users on 7/1. 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 8/45:30 amMSO - ONT
1 stop4h 17mDelta
Mon 8/45:09 pmONT - MSO
1 stop6h 15mDelta
Deal found 7/1$241
This Expedia deal was found by Cheapflights users on 7/2. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/1412:40 pmMSO - ONT
1 stop12h 10mFrontier
Thu 7/1712:59 amONT - MSO
1 stop9h 55mFrontier
Deal found 7/2$281
This Alaska Airlines deal was found by Cheapflights users on 7/1. 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 8/76:35 amMSO - ONT
1 stop5h 30mAlaska Airlines
Sun 8/104:00 pmONT - MSO
1 stop7h 19mAlaska Airlines
Deal found 7/1$284
This Orbitz deal was found by Cheapflights users on 7/2. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/36:36 pmMSO - ONT
1 stop6h 39mMultiple Airlines
Sun 8/108:09 pmONT - MSO
2 stops14h 45mMultiple Airlines
Deal found 7/2$346
This American Airlines deal was found by Cheapflights users on 7/2. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/153:55 pmMSO - ONT
2 stops20h 37mAmerican Airlines
Sat 8/236:17 amONT - MSO
2 stops10h 32mAmerican Airlines
Deal found 7/2$355
This United Airlines deal was found by Cheapflights users on 7/1. 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.
Mon 7/1410:37 amMSO - ONT
1 stop7h 48mUnited Airlines
Fri 7/181:34 pmONT - MSO
1 stop6h 49mUnited Airlines
Deal found 7/1$401

Cheapflights Fare Finder

Customize your flight search to find flights from Missoula to Ontario 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 3, 2025.
Use the filters below to find and compare flights from Missoula to Ontario that are best for you.

Fly from

Missoula

Fly to

Ontario

Route

Depart

Return

Price

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Mon 8/4

5:30 am-8:47 am

1 stop4h 17m

Ontario

Mon 8/4

5:09 pm-12:24 am

1 stop6h 15m

$241

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Mon 7/14

12:40 pm-11:50 pm

1 stop12h 10m

Ontario

Thu 7/17

12:59 am-11:54 am

1 stop9h 55m

$281

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Thu 8/7

6:35 am-11:05 am

1 stop5h 30m

Ontario

Sun 8/10

4:00 pm-12:19 am

1 stop7h 19m

$284

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Sun 8/3

6:36 pm-12:15 am

1 stop6h 39m

Ontario

Sun 8/10

8:09 pm-11:54 am

2 stops14h 45m

$346

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Fri 8/15

3:55 pm-11:32 am

2 stops20h 37m

Ontario

Sat 8/23

6:17 am-5:49 pm

2 stops10h 32m

$355

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Mon 7/14

10:37 am-5:25 pm

1 stop7h 48m

Ontario

Fri 7/18

1:34 pm-9:23 pm

1 stop6h 49m

$401

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Wed 8/13

6:35 am-11:05 am

1 stop5h 30m

$120

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Wed 9/10

6:24 pm-10:40 pm

1 stop5h 16m

$121

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Mon 7/14

12:40 pm-11:50 pm

1 stop12h 10m

$129

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Tue 9/9

6:40 am-6:16 pm

2 stops12h 36m

$161

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 12 results
1
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Best time to book a flight from Missoula to Ontario

Have a flexible travel schedule? Discover the best time to fly to Ontario from Missoula 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 Missoula to Ontario

What is the cheapest month to book a flight from Missoula to Ontario?

Currently, August is the cheapest month in which you can book a flight from Missoula to Ontario (average of $246). Flying from Missoula to Ontario in March is currently the most expensive (average of $328). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from MSO to ONT?

Find hourly flight availability from Missoula to Ontario. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 3, 2025.

It’s optimal to fly from Missoula to Ontario in the afternoon. By choosing this option you can save up to 32% on the cost of your flight, compared to a flight in the morning.

Reviews of airlines servicing Ontario

Get insights into the airlines that provide service to Ontario. 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 Ontario. Reviews last updated July 3, 2025.
Read through reviews of airlines operating flights from Missoula to Ontario, such as Alaska Airlines, Delta, and United Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Crew

8.5

Food

7.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Alaska Airlines
8.0
Very good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Crew

8.5

Food

7.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Delta
8.0
Very good
7,982 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Crew

8.5

Food

7.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
United Airlines
7.4
Good
8,861 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Crew

8.5

Food

7.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
American Airlines
7.2
Good
10,000 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Crew

8.5

Food

7.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Frontier
5.9
Fair
3,286 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Boarding

8.1

Entertainment

7.1

Crew

8.5

Food

7.1

Overall

8.0

Comfort

7.8

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.

Related info for your journey

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

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

    According to our current data, Delta ($241), Frontier ($281), and Alaska Airlines ($284) offers the cheapest pricing from Missoula to Ontario. Users have found that Delta is 40% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from Missoula to Ontario one-way?

    The cheapest airline one-way is Alaska Airlines, with whom users have recently found tickets for as low as $120. However, be on the lookout for offers from Delta and Frontier, as they are both options that can get you from Missoula to Ontario for a low price.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Missoula to Ontario 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 Missoula to Ontario?

    Currently, August is the cheapest month in which you can book a flight from Missoula to Ontario (average of $246). Flying from Missoula to Ontario in March is currently the most expensive (average of $328). 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 Missoula to Ontario

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Top 2 airlines flying from Missoula to Ontario

Discover the top 2 airlines that operate flights from Missoula to Ontario. 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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$229Average$338FlexibilityNo cancel feeOn-time75%
DeltaCheapest$244Average$309FlexibilityNo cancel feeOn-timeN/A

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