$49 Cheap flights to Ontario
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight to Ontario departing on 8/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Ontario flights insights and trends
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What is the cheapest month to fly to Ontario?
In general, September 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 $289. If you aren’t able to travel during the month of September, then book flights to Ontario from United States during April instead. Flights to Ontario in April, while not as cheap as those in September, still average around $307.
What is the absolute cheapest flight to Ontario?
In the past two weeks, users have booked deals to Ontario for $49/person, which is 85% 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.
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What is the cheapest day to depart on your flight to Ontario?
The cheapest day to depart on your flight to Ontario is on a Wednesday when prices can be found for as low as $333. This is often the case because there is less demand to fly during this day of the week. When flying out on a Tuesday, the most expensive travel day of the week, you can expect to see flight prices from United States to Ontario for around $380.
What is the cheapest time of day to depart on your flight to Ontario?
In the afternoon is the cheapest time of day to fly from United States to Ontario when you can find flight prices for as low as $332. Flying to Ontario in the afternoon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $364 on average. Flights to Ontario from United States in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.
Cheap Ontario flight deals and tips
Summary info about Ontario flight prices, duration and airlines
Best One-Way Price | $49 |
|---|---|
Best Round-Trip Price | $57 |
Fastest flight time | 1h 15m |
Popular in | April |
Frequently asked questions about flying to Ontario
How far in advance should I book a flight to Ontario?
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 $358. However, in the past 72 hours, people saw flights from United States for as low as $138.
Is there an alternative airport near Ontario?
Finding an alternative and possibly cheaper destination airport near Ontario is possible. If you are planning a flight to Ontario, consider booking flights to Ontario Airport (3 mi from Ontario city center), 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) or Burbank Bob Hope Airport (42 mi from Ontario city center).
Is there a cheaper alternative to flying into Ontario?
Prices vary based on where travelers are departing from, but on average, the cheapest airport to fly to in Ontario is San Bernardino Int Airport where the average price is $134. Users typically find the best prices when using momondo’s Airport-to-Airport Pricing Tool.
When did momondo last update prices for flights to Ontario Airport?
Prices for flights to Ontario Airport refresh daily.
How many operators does momondo search for flights to Ontario Airport?
As of June 2025, there are 18 operators available to choose from for flights to Ontario Airport.
How old do you have to be to fly to Ontario Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel to Ontario Airport.
What documentation or ID do you need to fly to Ontario Airport?
The required travel and health documents for your Ontario Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Ontario Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
Why use momondo?
Why should I use momondo to find a flight deal to Ontario?
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.
Can I find flights to Ontario with flexible booking policies on momondo?
Yes. All flights to Ontario on momondo can be compared and filtered by various policies on offer, including flexible booking.
How can momondo help me find flights to Ontario?
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.
I’m not ready to book a flight to Ontario right now. Can momondo alert me if prices change?
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.
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Popular flights to Ontario
Popular routes according to searches in the past day on momondo
Cheapest flight routes to Ontario
These routes have the cheapest flights to Ontario found by momondo users in United States
| Departing | Destination | Best Time | Best Price |
|---|---|---|---|
| Las Vegas | Ontario | 1h 05m | $91 |
| San Francisco | Ontario | 1h 20m | $94 |
| Oakland | Ontario | 1h 20m | $97 |
| Phoenix | Ontario | 1h 10m | $97 |
| San Jose | Ontario | 1h 15m | $97 |
| Portland | Ontario | 2h 17m | $100 |
| Denver | Ontario | 2h 15m | $129 |
| Seattle | Ontario | 2h 32m | $146 |
| San Diego | Ontario | 3h 19m | $153 |
| Dallas | Ontario | 3h 00m | $156 |
| Salt Lake City | Ontario | 1h 44m | $173 |
| Spokane | Ontario | 4h 00m | $174 |
| Houston | Ontario | 3h 18m | $176 |
| Sacramento | Ontario | 1h 20m | $177 |
| Fresno | Ontario | 3h 26m | $178 |
| Eugene | Ontario | 3h 40m | $179 |