$44 Cheap Flights from Ontario International
One-way
Departing from
Ontario International
Going to
anywhere
Santa Rosa (STS)
United States • May, 2026
88% AI deal score
$325 $79
Las Vegas (LAS)
United States • June, 2026
81% AI deal score
$345 $84
Guadalajara (GDL)
Mexico • May, 2026
81% AI deal score
$330 $137
Seattle (SEA)
United States • May, 2026
80% AI deal score
$183 $44
Boise (BOI)
United States • May, 2026
79% AI deal score
$270 $109
This is the lowest one-way flight price found by RatePunk users in the last 24 hours for a flight going to anywhere. Fares are subject to change and may not be available for all dates. (Data last updated 5/16/2026).
390,730 searches in the past 7 days on RatePunk
Flight deals up to 90% off
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AI deal score and AI insights
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Top Destinations Where Can You Fly from Ontario International
Cheap flights from Ontario International
Find flights from Ontario International to anywhere
Looking for inspiration on destinations? Here are some popular flight deals from Ontario International one-way fares:
See more destinations you can fly to from Ontario International – anywhere in the world at the best prices.
See More DestinationsLast-Minute Flights from Ontario International
The best flight deals leaving from Ontario International soon
Thu, May 14
⌛ Last-Minute
Ontario (ONT) - Reno (RNO)
United Airlines airlines • 1 stop • San Francisco (SFO)
$877
Thu, May 14
⌛ Last-Minute
Ontario (ONT) - Kumamoto (KMJ)
WestJet airlines • 3 stops • Seattle (SEA), Vancouver (YVR), Seoul (ICN)
$638
Thu, May 14
⌛ Last-Minute
Ontario (ONT) - Seoul (ICN)
WestJet airlines • 2 stops • Seattle (SEA), Vancouver (YVR)
$1,165
$576
-$589
51%
Thu, May 14
⌛ Last-Minute
Ontario (ONT) - Bodø (BOO)
Alaska Airlines, Inc. airlines • 3 stops • Portland (PDX), Amsterdam (AMS), Oslo (OSL)
$664
Thu, May 14
⌛ Last-Minute
Ontario (ONT) - Reno (RNO)
United Airlines airlines • 1 stop • San Francisco (SFO)
$699
Thu, May 14
⌛ Last-Minute
Ontario (ONT) - San José del Guaviare (SJE)
Frontier Airlines airlines • 3 stops • Denver (DEN), Panama (PTY), Bogotá (BOG)
$400
More last-minute deals from Ontario International
Need to travel soon? Here are some great last-minute flight deals from Ontario International for trips departing in the next couple of weeks. (If you can plan ahead, booking about a month in advance is usually cheaper on average, but we’ve got you covered for spontaneous trips too!)
Tip: If you don’t see your preferred destination here, try searching anyway – new deals pop up daily. Also, remember that flights tend to cost less when booked ~30 days ahead rather than at the last minute, so if you’re planning a trip and have some flexibility, start looking early!
Facts About Flights from Ontario International
Nearby airport(s)
Insights for flights from Ontario International
Most popular airlines from Ontario International
American Airlines
Alaska Airlines, Inc.
JetBlue Airways
Delta Air Lines
Frontier Airlines
Allegiant Air
Hawaiian Airlines
Spirit Airlines
Most popular destinations from Ontario International
ONT Airport Deal Stats
Current most discounted routes
Avg. most discounted routes (last 3 months)
ONT airport insights
Best days to catch a deal
Wednesday, Monday
To snag the best flight deals from Ontario International Airport, Wednesday is your best bet based on historical data. You may have the least luck finding a deal on Saturday for flights originating from Ontario International Airport.
Avg. deal survival time
14.6 hours
The average flight deal from Ontario International Airport lasts about 14.6 hours. To snag these deals, it's important to be quick and decisive when you find a flight you like.
Rare deal frequency
7 deals
We've identified 7 rare flight deals from Ontario International airport in the last month. These exclusive deals, with AI Deal Scores of 90+, typically include mistake fares, special promotions, or ultra-discounts.
Average price drop
-54%
Deals that originate from Ontario International airport, have an average price drop of 53.8%. Travelers can save money on flights by departing from Ontario International.
Next 4 weeks: deal forecast
Ontario International (ONT) Flight Forecast - Next Month
Based on current data, flight deals from Ontario International are expected to remain relatively stable over the next month. There are no significant price drops or increases anticipated as of May 4, 2026.
Top 5 biggest price drops (last 3 months)
Found on April 29
ONT - Toronto
$723 → $131
82%
Found on April 28
ONT - Nagoya
$3,625 → $710
80%
Found on May 3
ONT - Rhodes
$2,625 → $548
79%
Found on April 28
ONT - Bangkok
$3,150 → $668
79%
Found on April 30
ONT - Cologne
$2,125 → $481
77%
Check these nearby airports too
Looking for more options? These airports near ONT sometimes drop rare deals too:
Los Angeles International (LAX)
~6 rare deals/month
San Diego International (SAN)
~10 rare deals/month
John Wayne (SNA)
~7 rare deals/month
If you’re flexible with departure cities, it’s worth keeping an eye on nearby airports — especially LAX and SAN for long-haul deal surprises.
Travel Trends: Popular Destinations from Ontario International
Every month, we analyze search and booking data to see where travelers from Ontario International are heading. Here are the current hot destinations from Ontario International:
Top domestic destinations
These cities are seeing the most searches and bookings from Ontario International this month.
Top international destinations
Travelers from Ontario International are flocking here, possibly due to seasonal events or great deals.
Travel trend insight
Travelers from Ontario are increasingly seeking culturally rich experiences abroad. London, Rome, and Tokyo are trending due to their historical significance, iconic landmarks, and unique cultural offerings, providing diverse and memorable travel experiences.
Booking Flights from Ontario International: Frequently Asked Questions
Pro Tips for Finding Cheap Flights from Ontario International
Finding the cheapest airfare from Ontario International is easier if you use a few smart strategies. Here are our top tips to help you score a great deal:
Be Flexible with Dates: Sometimes shifting your travel dates by just a day or two can lead to significant savings. Mid-week flights are often cheaper than weekend flights, and consider flying on holidays themselves!
Set Destination to 'Anywhere': Not sure where to go? Set your destination to 'Anywhere' on flight search engines. You might stumble upon a ridiculously cheap flight to a place you've never considered. It is a fun way to pick your next trip!
Embrace the Off-Season: Traveling during the off-peak season or shoulder season can save you a lot of money. Destinations are less crowded, and flights and accommodations are often cheaper. Plus, you might enjoy a more authentic experience.
Consider Nearby Airports: Don't limit yourself to just one airport. Flying in or out of a nearby airport can sometimes save you hundreds of dollars. Just be sure to factor in the cost and time of transportation to and from the alternative airport.
Compare Round-Trip vs. One-Way: Always compare the price of round-trip tickets versus booking two one-way tickets. Sometimes, airlines offer better deals if you book them separately, especially if you're flying with different airlines each way.
Leverage Points and Miles: If you have credit card points or airline miles, now is the time to use them. Redeeming points or miles can significantly reduce the cost of your flight, or even make it free! Make sure to check for transfer bonuses.
Book in Advance (But Not Too Early!): While last-minute deals can happen, booking a few months in advance is usually the sweet spot for domestic flights. For international flights, aim to book even earlier. But keep an eye out and do not book too early, as you might miss some deals!
Sign Up for Fare Alerts: Use flight comparison websites to set up fare alerts for your desired routes. You'll receive email notifications when the price drops, ensuring you never miss a deal. This helps you book your flight tickets in the optimal window.
Sniff out Error Fares: Airlines sometimes make mistakes and list ridiculously low fares. These 'error fares' don't last long, so be ready to pounce if you find one. Following travel blogs and forums can help you spot these deals quickly.
Set up RatePunk Price Alerts: RatePunk is your friend in finding cheap flights! Set up price alerts for your desired routes and travel dates. RatePunk will notify you when prices drop, ensuring you snag the best possible deal. Happy travels!
By using these tips and the tools on our site, you’ll increase your chances of finding a fantastic flight deal from Ontario International. Happy travels!
Explore More Destinations from Ontario International
Looking for more options? Here are some popular routes and related travel deals: