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$160+ 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 9/30. Fares are subject to change and may not be available on all flights or dates of travel.
MSO — ONT
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
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 September 15, 2025.

Round-trip from

$240
(Frontier)

One-way from

$160
(Alaska Airlines)

Popular in

December

Cheapest in

January

Average price

$340
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. 21% potential increase in price ($112 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 September 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 September 15, 2025.

This Frontier deal was found by Cheapflights users on 9/15. 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.
Fri 10/1012:50 pmMSO - ONT
1 stop12h 00mFrontier
Sun 10/126:53 amONT - MSO
1 stop28h 02mFrontier
Deal found 9/15$240
This Frontier deal was found by Cheapflights users on 9/14. 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.
Fri 10/1712:50 pmMSO - ONT
1 stop12h 00mFrontier
Sun 10/196:53 amONT - MSO
1 stop28h 02mFrontier
Deal found 9/14$258
This Alaska Airlines deal was found by Cheapflights users on 9/14. 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 10/236:40 pmMSO - ONT
1 stop6h 23mAlaska Airlines
Mon 10/276:00 amONT - MSO
1 stop5h 19mAlaska Airlines
Deal found 9/14$260
This Delta deal was found by Cheapflights users on 9/15. 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 10/246:20 pmMSO - ONT
1 stop6h 19mDelta
Thu 10/304:35 pmONT - MSO
1 stop6h 42mDelta
Deal found 9/15$261
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 12/255:20 amMSO - ONT
1 stop7h 48mAlaska Airlines
Thu 1/811:30 amONT - MSO
1 stop5h 26mAlaska Airlines
Deal found 9/15$295
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 10/265:30 amMSO - ONT
1 stop5h 28mAlaska Airlines
Tue 10/286:00 amONT - MSO
1 stop5h 19mAlaska Airlines
Deal found 9/15$296
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 12/244:21 pmMSO - ONT
1 stop8h 53mAlaska Airlines
Tue 1/136:00 amONT - MSO
1 stop6h 52mAlaska Airlines
Deal found 9/15$302
This Delta deal was found by Cheapflights users on 9/14. 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 11/226:18 pmMSO - ONT
1 stop4h 17mDelta
Thu 11/276:00 amONT - MSO
1 stop5h 33mDelta
Deal found 9/14$305
This United Airlines deal was found by Cheapflights users on 9/15. 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 11/192:35 pmMSO - ONT
1 stop7h 09mUnited Airlines
Sun 11/235:05 amONT - MSO
1 stop7h 28mUnited Airlines
Deal found 9/15$308
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 12/235:20 amMSO - ONT
1 stop19h 39mAlaska Airlines
Wed 1/146:00 amONT - MSO
1 stop6h 52mAlaska Airlines
Deal found 9/15$312
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 12/244:21 pmMSO - ONT
1 stop8h 53mAlaska Airlines
Thu 1/86:00 amONT - MSO
1 stop6h 52mAlaska Airlines
Deal found 9/15$321
This Alaska Airlines deal was found by Cheapflights users on 9/15. 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 12/235:20 amMSO - ONT
1 stop19h 39mAlaska Airlines
Mon 1/126:00 amONT - MSO
1 stop6h 52mAlaska Airlines
Deal found 9/15$331

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 September 15, 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

Thu 10/23

6:40 pm-12:03 am

1 stop6h 23m

Ontario

Mon 10/27

6:00 am-12:19 pm

1 stop5h 19m

$260

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Sat 2/28

2:35 pm-10:37 pm

1 stop9h 02m

Ontario

Wed 3/4

7:00 am-1:09 pm

1 stop5h 09m

$281

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Thu 12/25

5:20 am-12:08 pm

1 stop7h 48m

Ontario

Tue 1/13

6:00 am-1:52 pm

1 stop6h 52m

$295

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Thu 10/9

6:40 pm-12:03 am

1 stop6h 23m

Ontario

Tue 10/14

7:10 am-1:27 pm

1 stop5h 17m

$295

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Thu 12/25

5:20 am-12:08 pm

1 stop7h 48m

Ontario

Wed 1/14

6:00 am-1:52 pm

1 stop6h 52m

$295

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Sun 10/26

5:30 am-9:58 am

1 stop5h 28m

Ontario

Tue 10/28

6:00 am-12:19 pm

1 stop5h 19m

$296

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Wed 12/24

6:00 am-12:14 am

1 stop19h 14m

Ontario

Sat 1/10

6:00 am-1:52 pm

1 stop6h 52m

$302

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Sat 11/22

6:18 pm-9:35 pm

1 stop4h 17m

Ontario

Thu 11/27

6:00 am-12:33 pm

1 stop5h 33m

$305

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Tue 9/30

6:35 am-10:44 am

1 stop5h 09m

$160

MissoulaOntario

MSO - ONT

MSOONT

Missoula Johnson-Bell Field

Tue 9/30

5:30 am-8:58 am

1 stop4h 28m

$161

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 18 results
1
2

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 September 15, 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 September 15, 2025.
Read through reviews of airlines operating flights from Missoula to Ontario, such as Alaska Airlines and Delta. 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

Comfort

7.8

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
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

Boarding

8.1

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.
Delta
8.0
Very good
7,954 reviews
Alaska Airlines
8.0
Very good
10,000 reviews

Comfort

7.8

Overall

8.0

Food

7.1

Boarding

8.1

Crew

8.5

Entertainment

7.0

Reviews

1 / 20
6.0
Good

Hannah,Aug 2025

SFO - SAN

Ticket said TSA pre check, but then the TSA agent said that Alaska Airlines has not actually entered the pre check information for the ticket, so I had to use regular security. During boarding, I have a disability and need to board early. The Alaska Airlines employee announced disability boarding, but then immediately announced 2 other groups to board, so I still had to fight the crowds. On the plane, the stewardess was brusk and rude. Seats were very uncomfortable, especially on lower back.

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.

  • How long is the flight from Missoula to Ontario?

    Airlines like Alaska Airlines and Hawaiian Airlines fly from Missoula to Ontario in about 6h 23m. The time it takes to get you to your destination can typically vary by up to 2h 39m. The distance from Missoula to Ontario is about 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 Missoula to Ontario round-trip?

    According to our current data, Alaska Airlines ($229), and Delta ($244) offers the cheapest pricing from Missoula to Ontario. Users have found that Alaska Airlines is 43% 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 $160. However, be on the lookout for offers from Delta and Hawaiian Airlines, 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

See prices for flight routes from nearby airports that may be better suited for you.
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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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
Alaska AirlinesCheapest$229Average$325FlexibilityNo cancel feeOn-time75%
DeltaCheapest$244Average$335FlexibilityNo cancel feeOn-timeN/A

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