Find cheap flights to Ontario

Round-trip
1 adult
Economy
From?
To?
Tue 6/28
Tue 7/5

Deals available from 900+ travel sites.

About Flights to Ontario

Summary info about Ontario flight prices, duration and airlines

Best One-Way Price

$41

Best Round-Trip Price

$81

Fastest flight time

1h 31m

Operated By

2 airlines
The best one-way flight price to Ontario from United States in the last 72 hours is $41 (San Francisco to Ontario).
The best round-trip flight price to Ontario from United States in the last 72 hours is $81 (San Francisco to Ontario).
The fastest flight to Ontario from United States takes 1h 31m (San Francisco to Ontario).
There are 2 airlines operating flights to Ontario, including United Airlines and Frontier.

When is the best time to fly to Ontario?

In the past two weeks, users have booked deals to Ontario for $16/person, which is 99% cheaper than the average flight to Ontario. To find the cheapest price to Ontario from your area, use momondo’s Airport-to-Airport Pricing Tool.

In general, October is the cheapest month to fly from United States to Ontario. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $224. If you aren’t able to travel during the month of October, then book flights to Ontario from United States during January instead. Flights to Ontario in January, while not as cheap as those in October, still average around $266.

Most flyers found that booking tickets 54 days in advance of their planned departure date is the best time to get cheap flights to Ontario. During this timeframe, flight prices are around $373. However, in the past 72 hours, people saw flights from United States for as low as $81.

The cheapest day to depart on your flight to Ontario is on a Wednesday when prices can be found for as low as $322. This is often the case because there is less demand to fly during this day of the week. When flying out on a Monday, the most expensive travel day of the week, you can expect to see flight prices from United States to Ontario for around $419.

In the morning is the cheapest time of day to fly from United States to Ontario when you can find flight prices for as low as $324. Flying to Ontario in the morning is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $382 on average. Flights to Ontario from United States at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

If you’re looking to do your hiking in warmer conditions, consider planning your flight to Ontario for January, February, and March. Parks like Old Town San Diego State Historic Park are popular hot spots in those months.

Finding an alternative and possibly cheaper destination airport near Ontario is possible. If you are planning a flight to Ontario, consider booking flights to San Bernardino Int Airport (24 mi from Ontario city center), Santa Ana J. Wayne/Orange Cnty Airport (29 mi from Ontario city center), Long Beach Municipal Airport (33 mi from Ontario city center), Burbank Bob Hope Airport (42 mi from Ontario city center) or Los Angeles Airport (44 mi from Ontario city center).

Prices vary based on where travelers are departing from, but on average, the cheapest airport to fly to in Ontario is Burbank Bob Hope Airport where the average price is $632pp. Users typically find the best prices when using momondo’s Airport-to-Airport Pricing Tool.



Ontario flight deals found on momondo

Check out some of the best fares from airports in United States to Ontario found recently by users on momondo
Frontier
Sep 8
SFO11:17 amSan Francisco
1h 34m
ONT12:51 pmOntario
Sep 12
ONT7:59 amOntario
1h 28m
SFO9:27 amSan Francisco
Frontier
Sep 9
SFO5:31 amSan Francisco
1h 34m
ONT7:05 amOntario
Sep 11
ONT2:05 pmOntario
1h 28m
SFO3:33 pmSan Francisco
Frontier
Sep 15
SFO11:17 amSan Francisco
1h 34m
ONT12:51 pmOntario
Sep 18
ONT2:05 pmOntario
1h 28m
SFO3:33 pmSan Francisco
Frontier
Jul 16
DEN6:25 pmDenver Intl
2h 19m
ONT8:44 pmOntario
Jul 23
ONT1:30 amOntario
2h 25m
DEN3:55 amDenver Intl
Frontier
Jul 16
DEN6:25 pmDenver Intl
2h 19m
ONT8:44 pmOntario
Jul 23
ONT1:30 amOntario
2h 25m
DEN3:55 amDenver Intl
Frontier
Sep 9
SFO5:31 amSan Francisco
1h 34m
ONT7:05 amOntario
Sep 12
ONT7:59 amOntario
1h 28m
SFO9:27 amSan Francisco

Find the cheapest one-way flights to Ontario

If you're looking for one-way flights from United States to Ontario, view some of our deals below provided by Frontier
Frontier
Sep 8
SFO11:17 amSan Francisco
1h 34m
ONT12:51 pmOntario
Frontier
Sep 11
SFO11:46 amSan Francisco
1h 34m
ONT1:20 pmOntario
Frontier
Sep 22
SFO11:17 amSan Francisco
1h 34m
ONT12:51 pmOntario

Which airlines fly to Ontario?

Here you can see a selection of the most popular and cheapest airlines for flights to Ontario

Which airlines fly to Ontario?

When flying to Ontario from United States, momondo travelers will most often fly with one of these popular airlines: American Airlines, Frontier, Delta or United Airlines. Depending on what airport in United States you fly from, you may be able to find flights with any of these popular airlines.

Alaska Airlines Flights to Ontario

Alaska Airlines operates around 17 flights into Ontario in any given week. The most common departure point for these flights was from Seattle/Tacoma Intl, with the best round-trip Alaska Airlines deal found being $38 (Boston Logan Intl to Ontario). Users have rated Alaska Airlines 8.0/10 in over 615 reviews on momondo.

Delta Flights to Ontario

Delta flight deals to Ontario start from $84 - this is the best price found recently on momondo, and was a round-trip journey departing from Boston Logan Intl. Over any normal week, Delta flight prices are typically higher, but vary depending on where you fly from - Salt Lake City is the most popular Delta departure point to Ontario so generally has the most availability. Delta is scored a 7.8/10 in 392 reviews.


Popular routes to Ontario

Most frequently searched flights to Ontario along with the cheapest price and shortest flight duration
Seattle to Ontario Flights
Fastest flight time2h 29m
Cheapest price$178
Dallas to Ontario Flights
Fastest flight time2h 53m
Cheapest price$186
Denver to Ontario Flights
Fastest flight time2h 15m
Cheapest price$126
Portland to Ontario Flights
Fastest flight time2h 12m
Cheapest price$188
Washington, D.C. to Ontario Flights
Fastest flight time7h 06m
Cheapest price$337
San Francisco to Ontario Flights
Fastest flight time1h 25m
Cheapest price$88
Houston to Ontario Flights
Fastest flight time3h 06m
Cheapest price$220
Boston to Ontario Flights
Fastest flight time7h 50m
Cheapest price$296
Atlanta to Ontario Flights
Fastest flight time4h 17m
Cheapest price$308
San Jose to Ontario Flights
Fastest flight time5h 02m
Cheapest price$360
New York to Ontario Flights
Fastest flight time8h 10m
Cheapest price$245
Philadelphia to Ontario Flights
Fastest flight time7h 45m
Cheapest price$339
Honolulu to Ontario Flights
Fastest flight time5h 35m
Cheapest price$351
Miami to Ontario Flights
Fastest flight time7h 40m
Cheapest price$337
Detroit to Ontario Flights
Fastest flight time7h 11m
Cheapest price$328
Salt Lake City to Ontario Flights
Fastest flight time1h 43m
Cheapest price$134
Minneapolis to Ontario Flights
Fastest flight time5h 23m
Cheapest price$208
Fort Lauderdale to Ontario Flights
Fastest flight time7h 07m
Cheapest price$302
Charlotte to Ontario Flights
Fastest flight time4h 44m
Cheapest price$340
Chicago to Ontario Flights
Fastest flight time3h 31m
Cheapest price$230

Start planning your trip to Ontario


Why use momondo?

momondo collates all your flight options in one place and lets you filter them to find the perfect flight to Ontario. momondo saves you time and could save you money on your trip.

Yes. All flights to Ontario on momondo can be compared and filtered by various policies on offer, including flexible booking.

Once you have performed a search in the form on the page, momondo provides useful filters and insights. We can show you the cheapest days and times to fly as well as filter your options to help you make an informed choice when booking flights to Ontario.

If you are not ready to book a flight to Ontario now, use our insights above to find helpful tips or alternatively set up a price alert; this is where momondo will track prices on flights to Ontario and let you know when they change.


Here's why travelers choose to use momondo
Flexible Travel
momondo understands the need for flexibility and we have a filter specifically for flights with no change fees.
Expert Insights
Data driven insights designed to help you find a great flight deal. From the cheapest time to depart to how far in advance to book.
Price Alerts
Track the price of your preferred flight route and be notified when it changes.