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$171+ Cheap flights from Flagstaff to Ontario (FLG - 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 9/24. Fares are subject to change and may not be available on all flights or dates of travel.
FLG — ONT
Aug 19 — Aug 261
Tue 8/19
Tue 8/26
1 adult, Economy
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Cheap flight deals from Flagstaff to Ontario

Discover tips and strategies to find the most affordable flight options for your journey from Flagstaff (FLG) 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 August 14, 2025.

Round-trip from

$337
(American Airlines)

One-way from

$171
(American Airlines)

Popular in

January

Cheapest in

May

Average price

$315
From Flagstaff Pulliam to Ontario
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One-way flight from Flagstaff Pulliam to Ontario
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Highest demand for flights based on searches. 10% potential increase in price ($67 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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Find flight deals from Flagstaff to Ontario

Cheapest flights from Flagstaff to Ontario
Explore the most affordable flight options available from Flagstaff to Ontario. Find the lowest fares from popular airlines and budget airlines, with prices last updated on August 14, 2025.

This American Airlines deal was found by Cheapflights users on 8/13. 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.
Sat 11/110:17 amFLG - ONT
1 stop5h 07mAmerican Airlines
Sun 11/25:20 amONT - FLG
1 stop5h 10mAmerican Airlines
Deal found 8/13$337
This American Airlines deal was found by Cheapflights users on 8/13. 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.
Wed 9/38:00 amFLG - ONT
1 stop3h 56mAmerican Airlines
Wed 9/34:45 pmONT - FLG
1 stop3h 33mAmerican Airlines
Deal found 8/13$396
This American Airlines deal was found by Cheapflights users on 8/13. 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.
Thu 8/286:07 pmFLG - ONT
1 stop3h 32mAmerican Airlines
Tue 9/26:17 amONT - FLG
1 stop3h 41mAmerican Airlines
Deal found 8/13$406
This American Airlines deal was found by Cheapflights users on 8/13. 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.
Thu 8/286:07 pmFLG - ONT
1 stop3h 32mAmerican Airlines
Thu 9/46:10 amONT - FLG
1 stop3h 48mAmerican Airlines
Deal found 8/13$426
This American Airlines deal was found by Cheapflights users on 8/13. 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.
Sat 8/3010:30 amFLG - ONT
1 stop5h 54mAmerican Airlines
Wed 9/34:45 pmONT - FLG
1 stop3h 33mAmerican Airlines
Deal found 8/13$446
This American Airlines deal was found by Cheapflights users on 8/13. 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 8/3110:30 amFLG - ONT
1 stop5h 54mAmerican Airlines
Sun 8/317:32 pmONT - FLG
1 stop3h 20mAmerican Airlines
Deal found 8/13$450
This American Airlines deal was found by Cheapflights users on 8/13. 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.
Mon 9/18:15 amFLG - ONT
1 stop3h 17mAmerican Airlines
Tue 9/26:17 amONT - FLG
1 stop3h 41mAmerican Airlines
Deal found 8/13$456
This American Airlines deal was found by Cheapflights users on 8/13. 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.
Mon 9/16:07 pmFLG - ONT
1 stop3h 32mAmerican Airlines
Wed 9/36:10 amONT - FLG
1 stop5h 15mAmerican Airlines
Deal found 8/13$476
This American Airlines deal was found by Cheapflights users on 8/13. 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 8/298:15 amFLG - ONT
1 stop3h 17mAmerican Airlines
Fri 8/297:02 pmONT - FLG
1 stop3h 50mAmerican Airlines
Deal found 8/13$556
This American Airlines deal was found by Cheapflights users on 8/13. 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.
Wed 9/38:00 amFLG - ONT
2 stops14h 33mAmerican Airlines
Thu 9/46:10 amONT - FLG
1 stop3h 48mAmerican Airlines
Deal found 8/13$613
This American Airlines deal was found by Cheapflights users on 8/13. 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.
Tue 9/28:15 amFLG - ONT
1 stop3h 17mAmerican Airlines
Tue 9/24:54 pmONT - FLG
1 stop24h 00mAmerican Airlines
Deal found 8/13$617
This American Airlines deal was found by Cheapflights users on 8/13. 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.
Sat 8/308:15 amFLG - ONT
1 stop3h 17mAmerican Airlines
Sat 8/304:54 pmONT - FLG
1 stop24h 43mAmerican Airlines
Deal found 8/13$682

Cheapflights Fare Finder

 
Customize your flight search to find flights from Flagstaff 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 August 14, 2025.
Use the filters below to find and compare flights from Flagstaff to Ontario that are best for you.

Fly from

Flagstaff

Fly to

Ontario

Route

Depart

Return

Price

FlagstaffOntario

FLG - ONT

FLGONT

Flagstaff Pulliam

Sat 11/1

10:17 am-3:24 pm

1 stop5h 07m

Ontario

Sun 11/2

5:20 am-11:30 am

1 stop5h 10m

$337

FlagstaffOntario

FLG - ONT

FLGONT

Flagstaff Pulliam

Wed 9/3

10:38 am-4:05 pm

1 stop5h 27m

Ontario

Thu 9/4

4:45 pm-8:18 pm

1 stop3h 33m

$396

FlagstaffOntario

FLG - ONT

FLGONT

Flagstaff Pulliam

Wed 9/3

8:00 am-11:56 am

1 stop3h 56m

Ontario

Wed 9/3

4:45 pm-8:18 pm

1 stop3h 33m

$396

FlagstaffOntario

FLG - ONT

FLGONT

Flagstaff Pulliam

Fri 8/29

6:07 pm-9:39 pm

1 stop3h 32m

Ontario

Mon 9/1

7:02 pm-10:52 pm

1 stop3h 50m

$406

FlagstaffOntario

FLG - ONT

FLGONT

Flagstaff Pulliam

Thu 8/28

6:07 pm-9:39 pm

1 stop3h 32m

Ontario

Sun 8/31

4:54 pm-10:52 pm

1 stop5h 58m

$406

FlagstaffOntario

FLG - ONT

FLGONT

Flagstaff Pulliam

Thu 8/28

6:07 pm-9:39 pm

1 stop3h 32m

Ontario

Tue 9/2

6:17 am-9:58 am

1 stop3h 41m

$406

FlagstaffOntario

FLG - ONT

FLGONT

Flagstaff Pulliam

Thu 8/28

8:15 am-11:32 am

1 stop3h 17m

Ontario

Mon 9/1

6:17 am-9:58 am

1 stop3h 41m

$406

FlagstaffOntario

FLG - ONT

FLGONT

Flagstaff Pulliam

Fri 8/29

6:07 pm-9:39 pm

1 stop3h 32m

Ontario

Sun 8/31

7:32 pm-10:52 pm

1 stop3h 20m

$406

FlagstaffOntario

FLG - ONT

FLGONT

Flagstaff Pulliam

Fri 8/29

6:07 pm-9:39 pm

1 stop3h 32m

Ontario

Tue 9/2

6:17 am-9:58 am

1 stop3h 41m

$406

FlagstaffOntario

FLG - ONT

FLGONT

Flagstaff Pulliam

Fri 8/29

6:07 pm-9:39 pm

1 stop3h 32m

Ontario

Wed 9/3

6:10 am-9:58 am

1 stop3h 48m

$426

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/13

Showing 1-10 of 20 results
1
2

Best time to book a flight from Flagstaff to Ontario

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

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

Currently, August is the cheapest month in which you can book a flight from Flagstaff to Ontario (average of $246). Flying from Flagstaff 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.

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 August 14, 2025.
Read reviews from past customers who have flown American Airlines from Flagstaff to Ontario. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
American Airlines
7.2
Good
10,000 reviews

Crew

8.0

Food

6.5

Boarding

7.5

Comfort

7.2

Overall

7.2

Entertainment

6.9

Reviews

1 / 20
4.0
Okay

Amanda,Sep 2023

PHX - OGG

The flight attendants only came thru twice for drink service the entire 6 hour flight. The first was 90 minutes in and the second was an hour before landing. It feels like it should be more.
American Airlines
7.2
Good
10,000 reviews
American Airlines
7.2
Good
10,000 reviews

Crew

8.0

Food

6.5

Boarding

7.5

Comfort

7.2

Overall

7.2

Entertainment

6.9

Reviews

1 / 20
4.0
Okay

Amanda,Sep 2023

PHX - OGG

The flight attendants only came thru twice for drink service the entire 6 hour flight. The first was 90 minutes in and the second was an hour before landing. It feels like it should be more.

Related info for your journey

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

  • What is the cheapest airline to fly from Flagstaff to Ontario round-trip?

    Flying on American Airlines is currently your cheapest option to Ontario, with prices starting at $315.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Flagstaff to Ontario (average of $246). Flying from Flagstaff 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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Top airline flying from Flagstaff to Ontario

Discover the top airline that operate flights from Flagstaff 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 August 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$315Average$395FlexibilityNo cancel feeOn-time71%

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