ONT - FLG

$340 Find Cheap Flights from Ontario to Flagstaff

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Ontario to Flagstaff departing on 9/12. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Flagstaff

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Flagstaff, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Ontario to Flagstaff, as well as popular online travel agencies
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41,299,237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$474
Typical prices: $625-$525
American Airlines
Thu 7/23Sun 7/26
ONT - FLG • 1 stop
Cheapest one-way
$340
American Airlines
Sat 9/12
ONT - FLG • 1 stop
Nonstop flights
Not available
There are currently no direct flights between Ontario and Flagstaff. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
When to travel
December
Cheapest • 100% price drop
October
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Flagstaff!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Ontario to Flagstaff (ONT-FLG)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Ontario to Flagstaff that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Ontario to Flagstaff

Thu, Jul 23 - Sun, Jul 26
American Airlines Logo
6:11 am - 11:08 am
ONT
-
FLG
4h 57m
1 stop
American Airlines Logo
6:27 pm - 9:43 pm
FLG
-
ONT
3h 16m
1 stop
$474American Airlines
Tue, Oct 13 - Mon, Oct 19
American Airlines Logo
8:00 pm - 5:32 pm
ONT
-
FLG
21h 32m
1 stop
American Airlines Logo
6:59 pm - 8:30 am
FLG
-
ONT
37h 31m
1 stop
$476American Airlines
Tue, Nov 24 - Tue, Dec 1
American Airlines Logo
6:20 am - 12:30 pm
ONT
-
FLG
5h 10m
1 stop
American Airlines Logo
7:05 pm - 9:59 pm
FLG
-
ONT
3h 54m
1 stop
$484American Airlines
Tue, Oct 13 - Mon, Oct 19
American Airlines Logo
4:59 pm - 10:40 pm
ONT
-
FLG
5h 41m
1 stop
American Airlines Logo
1:18 pm - 5:47 pm
FLG
-
ONT
4h 29m
1 stop
$485American Airlines
Thu, Oct 22 - Sun, Oct 25
American Airlines Logo
1:31 pm - 5:32 pm
ONT
-
FLG
4h 01m
1 stop
American Airlines Logo
1:18 pm - 5:47 pm
FLG
-
ONT
4h 29m
1 stop
$494American Airlines
Wed, Jul 1 - Tue, Jul 7
American Airlines Logo
6:10 am - 11:13 am
ONT
-
FLG
5h 03m
1 stop
American Airlines Logo
1:50 pm - 6:18 pm
FLG
-
ONT
4h 28m
1 stop
$496American Airlines
Mon, Nov 23 - Wed, Dec 2
American Airlines Logo
9:59 am - 3:34 pm
ONT
-
FLG
4h 35m
1 stop
American Airlines Logo
7:45 am - 12:00 pm
FLG
-
ONT
5h 15m
1 stop
$514American Airlines
Sat, Jun 27 - Thu, Jul 2
American Airlines Logo
6:10 am - 9:55 am
ONT
-
FLG
3h 45m
1 stop
American Airlines Logo
1:50 pm - 6:18 pm
FLG
-
ONT
4h 28m
1 stop
$526American Airlines
Sun, Jul 26 - Sun, Aug 2
American Airlines Logo
1:11 pm - 5:49 pm
ONT
-
FLG
4h 38m
1 stop
American Airlines Logo
6:27 pm - 9:43 pm
FLG
-
ONT
3h 16m
1 stop
$544American Airlines
Tue, Jun 30 - Tue, Jul 7
American Airlines Logo
6:10 am - 11:13 am
ONT
-
FLG
5h 03m
1 stop
American Airlines Logo
1:50 pm - 6:18 pm
FLG
-
ONT
4h 28m
1 stop
$566American Airlines
Booking Insights

KAYAK's insights & trends for Ontario to Flagstaff flights

Get data-powered insights and trends into flights from Ontario to Flagstaff to help you find the cheapest flights, the best time to fly and much more.

What is the cheapest month to fly from Ontario to Flagstaff?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Ontario to Flagstaff, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Ontario to Flagstaff is December, where tickets cost $0 (return) on average. On the other hand, the most expensive months are March and July, where the average cost of round-trip tickets is $620 and $575 respectively.

Find deals

Good to know

Low seasonJune
Cheapest flight$340
Best time to beat the crowds with an average 25% drop in price.
Most popular time to fly and prices are also 8% lower on average.
Flight from Ontario to Flagstaff

When to book flights from Ontario to Flagstaff

Are your dates flexible? Find out the best times to travel from Ontario to Flagstaff based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Ontario to Flagstaff

  • What is the cheapest flight from Ontario to Flagstaff?

    In the last 5 days, the lowest price for a flight from Ontario to Flagstaff was $340 for a one-way ticket and $474 for a round-trip.

  • Do I need a passport to fly between Ontario and Flagstaff?

    No, a passport isn't needed to fly from Ontario to Flagstaff. However, local authorities might ask for an official ID.

  • Which aircraft models fly most regularly from Ontario to Flagstaff?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Ontario to Flagstaff?

    oneworld is the only airline alliance operating flights between Ontario and Flagstaff.

  • How does KAYAK find such low prices on flights from Ontario to Flagstaff?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Ontario to Flagstaff.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Ontario to Flagstaff?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Flagstaff from Ontario is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Ontario to Flagstaff?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Flagstaff with an airline and back to Ontario with another airline. Booking your flights between Ontario and FLG can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Ontario to Flagstaff?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Flagstaff from Ontario up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top airline flying from Ontario to Flagstaff

 
See real verified KAYAK customer reviews for airlines flying from Ontario to Flagstaff. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Ontario to Flagstaff? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.1
American AirlinesOverall score based on 11666 reviews
7.5Boarding
6.4Food
7.9Crew
6.8Entertainment
7.2Comfort
Airline reviews

Movies on my phone are great. It would be nice to have a gluten free snack option.

10.0 ExcellentJolene, May 2026
DFW - FLG
Read more American Airlines reviews

Movies on my phone are great. It would be nice to have a gluten free snack option.

Ontario airport boarding was very easy to park and access, is clean and TSA took 10 minutes total. Check-in was a breeze and cruise was very nice.

Seat bottom cushions are not good. I’m 165# & they hurt my butt. Plenty of legroom.

The airplane seats were spacious and comfortable, and the flight attendants were friendly and attentive. The food was delicious like never before. The blankets and toiletries were thoughtfully provided. The captain's navigation was steady and reliable. In short, having flown with Starlux, I won't consider any other airline next time.

Like: flights are on time, good boarding process Can improve: planes are old, improve entertainment and make space more comfortable

My flight got delayed a total of five times. And the boarding gate changed four times. most of the time the platform was not up-to-date with the changes taking place. The most discouraging part of the entire trip by far.

Original flight was on time, then late, then changed gates...4 times. Once our newest plane came in, it was fine.

The seats need better cushioning for a nearly 5-hour flight, it was a bit uncomfortable. I'm glad American has free wi-fi but there were was a bout 30 minutes in the middle of the flight when there was no connection which was frustrating.

My original flight got delayed day of so I had to rebook it from one layover to two layovers. The flight also left earlier which was a slight inconvenience but manageable. Then my first connection flight got delayed 3 separate times for a total of 2 hours delayed, causing me to miss my second connection flight back to Santa Barbara. Now, because of this missed flight, I am missing my college classes that I pay for.

The SFO Lounge crew were amazing. The bartender Faris was great. Thanks!

Everything you need to know for your flight from Ontario to Flagstaff

Information on your arrival and departure airports

Ontario (ONT)
Flagstaff (FLG)