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Missoula

$112+ 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 8/25. Fares are subject to change and may not be available on all flights or dates of travel.
ONT — MSO
Aug 2 — Aug 91
Sat 8/2
Sat 8/9
1 adult, Economy
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Cheap 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 28, 2025.

Round-trip from

$218
(Frontier)

One-way from

$112
(Trip.com)

Popular in

February

Cheapest in

January

Average price

$405
From Ontario to Missoula Johnson-Bell Field
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One-way flight from Ontario to Missoula Johnson-Bell Field
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Highest demand for flights based on searches. 11% potential increase in price ($53 potential increase over avg. RT price).
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Cheapest flight prices on average. 7% potential price decrease ($31 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 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 July 28, 2025.

This Frontier deal was found by Cheapflights users on 7/27. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/312:59 amONT - MSO
1 stop9h 55mFrontier
Fri 8/812:40 pmMSO - ONT
1 stop12h 10mFrontier
Deal found 7/27$218
This Alaska Airlines deal was found by Cheapflights users on 7/27. 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 9/97:10 amONT - MSO
1 stop5h 24mAlaska Airlines
Wed 9/106:35 amMSO - ONT
1 stop5h 09mAlaska Airlines
Deal found 7/27$240
This Hawaiian Airlines deal was found by Cheapflights users on 7/28. 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 Hawaiian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/276:00 amONT - MSO
1 stop8h 18mHawaiian Airlines
Wed 10/85:40 amMSO - ONT
1 stop5h 21mHawaiian Airlines
Deal found 7/28$259
This Delta deal was found by Cheapflights users on 7/27. 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 9/139:50 amONT - MSO
1 stop6h 17mDelta
Wed 9/175:30 amMSO - ONT
1 stop4h 27mDelta
Deal found 7/27$260
This United Airlines deal was found by Cheapflights users on 7/27. 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 8/105:05 amONT - MSO
1 stop7h 18mUnited Airlines
Wed 8/134:23 pmMSO - ONT
1 stop7h 29mUnited Airlines
Deal found 7/27$301
This Orbitz deal was found by Cheapflights users on 7/27. 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.
Thu 8/1412:59 amONT - MSO
1 stop9h 55mMultiple Airlines
Wed 8/205:45 amMSO - ONT
1 stop4h 41mMultiple Airlines
Deal found 7/27$324
This American Airlines deal was found by Cheapflights users on 7/27. 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.
Sun 8/107:02 pmONT - MSO
2 stops16h 59mAmerican Airlines
Wed 8/131:51 pmMSO - ONT
1 stop9h 57mAmerican Airlines
Deal found 7/27$467

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 28, 2025.
Use the filters below to find and compare flights from Ontario to Missoula that are best for you.

Fly from

Ontario

Fly to

Missoula

Route

Depart

Return

Price

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Thu 8/14

12:59 am-11:54 am

1 stop9h 55m

Missoula Johnson-Bell Field

Mon 8/18

12:40 pm-11:50 pm

1 stop12h 10m

$218

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Tue 9/9

7:10 am-1:34 pm

1 stop5h 24m

Missoula Johnson-Bell Field

Wed 9/10

6:35 am-10:44 am

1 stop5h 09m

$240

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Sat 9/27

6:00 am-3:18 pm

1 stop8h 18m

Missoula Johnson-Bell Field

Wed 10/8

5:40 am-10:01 am

1 stop5h 21m

$259

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Sat 9/13

9:50 am-5:07 pm

1 stop6h 17m

Missoula Johnson-Bell Field

Wed 9/17

5:30 am-8:57 am

1 stop4h 27m

$260

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Sun 8/10

5:05 am-1:23 pm

1 stop7h 18m

Missoula Johnson-Bell Field

Wed 8/13

4:23 pm-10:52 pm

1 stop7h 29m

$301

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Thu 8/14

12:59 am-11:54 am

1 stop9h 55m

Missoula Johnson-Bell Field

Wed 8/20

5:45 am-9:26 am

1 stop4h 41m

$324

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Sun 8/10

7:02 pm-1:01 pm

2 stops16h 59m

Missoula Johnson-Bell Field

Wed 8/13

1:51 pm-10:48 pm

1 stop9h 57m

$467

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Mon 8/25

6:00 am-5:31 pm

1 stop10h 31m

$112

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Sun 8/3

12:59 am-11:54 am

1 stop9h 55m

$115

OntarioMissoula

ONT - MSO

ONTMSO

Ontario

Thu 9/11

5:49 pm-11:59 pm

1 stop5h 10m

$120

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/27

Showing 1-10 of 14 results
1
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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 $365). Flying from Ontario to Missoula in March is currently the most expensive (average of $506). 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 ONT to MSO?

Find hourly flight availability from Ontario to Missoula. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated July 28, 2025.

A simple way to save on the total cost of your ticket is to fly from Ontario to Missoula in the evening. If you’re flexible enough to do this you can expect to save up to 55% on your trip compared to booking a flight at noon.

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 July 28, 2025.
Peruse reviews from past customers who have flown with Alaska Airlines, Delta, and Hawaiian 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.
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Entertainment

7.1

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

Comfort

7.8

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Entertainment

7.1

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
7,971 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Entertainment

7.1

Reviews

1 / 20
10.0
Excellent

James,Apr 2025

LAX - SFO

Good flight except the uncontrollable cold air from the ceiling.
Hawaiian Airlines
7.8
Good
2,604 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Entertainment

7.1

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
8,893 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Entertainment

7.1

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

Comfort

7.8

Overall

8.0

Food

7.1

Crew

8.5

Boarding

8.1

Entertainment

7.1

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 Ontario to Missoula. 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 Ontario to Missoula round-trip?

    Frontier, at $218, was found to be the cheapest airline from Ontario to Missoula.Alternate airlines to your destination round-trip include Alaska Airlines and Hawaiian Airlines. Frontier is priced at 48% lower than the current average price of a flight leaving 3 months from now.

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

    For one-way options, check prices for Frontier. According to our data, you can fly for as low as $115. Users have also found prices from $120 and $150 on Alaska Airlines and Hawaiian Airlines, respectively.

  • 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 $365). Flying from Ontario to Missoula in March is currently the most expensive (average of $506). 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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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 July 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$198Average$284FlexibilityNo cancel feeOn-timeN/A
Alaska AirlinesCheapest$273Average$405FlexibilityNo cancel feeOn-time75%

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