
$29 Cheap Flights from Ontario
One-way
Departing from
Ontario
Going to
anywhere
Santa Rosa (STS)
United States • April, 2026
99% AI deal score
$543 $79
San José del Cabo (SJD)
Mexico • December, 2025
92% AI deal score
$590 $94
Guatemala City (GUA)
Guatemala • February, 2026
85% AI deal score
$915 $141
Top Destinations Where Can You Fly from Ontario
Cheap flights from Ontario

Seattle, United States
TOP
Jan • Direct
$205
$29
-$176
86%

Seattle, United States
TOP
Jan • Direct
$205
$29
-$176
86%

Houston, United States
TOP
Dec • Direct
$218
$31
-$187
86%

Seattle, United States
TOP
Dec • Direct
$205
$29
-$176
86%

Seattle, United States
TOP
Dec • Direct
$205
$29
-$176
86%

Dallas, United States
TOP
Dec • Direct
$198
$29
-$169
85%
Find flights from Ontario to anywhere
Looking for inspiration on destinations? Here are some popular flight deals from Ontario one-way fares:
See more destinations you can fly to from Ontario – anywhere in the world at the best prices.
See More DestinationsFacts About Flights from Ontario
Nearby airport(s)
Insights for flights from Ontario
Most popular airlines from Ontario
American Airlines
Alaska Airlines, Inc.
JetBlue Airways
Delta Air Lines
Frontier Airlines
Allegiant Air
Hawaiian Airlines
ONT Airport Deal Stats
Current most discounted routes
Avg. most discounted routes (last 3 months)
ONT airport insights
Best days to catch a deal
Monday, Sunday
The best day to find a flight deal from Ontario International Airport is Tuesday, with Friday being a close second. You're most likely to find the lowest prices for flights departing Ontario International Airport on these days.
Avg. deal survival time
8.7 hours
Deals from Ontario International Airport don't last long, with an average lifespan of just 8.7 hours. This means travelers need to act fast to snag a deal departing from {{ Ontario International Airport }}.
Rare deal frequency
6 deals
We found 6 rare flight deals originating from Ontario International Airport in the past month, all with an AI Deal Score of 90 or higher. These rare deals typically include mistake fares, special promotions, or ultra-discounts.
Average price drop
-70%
The average price drop for flight deals originating from Ontario International Airport is 69.9%. This means travelers flying from Ontario International can expect significant savings on flight deals.
Next 4 weeks: deal forecast
Ontario International Flight Forecast
Based on trends, flights from Ontario International in December 2025 are expected to remain relatively stable. There are no major price drops or increases anticipated at this time.
Top 5 biggest price drops (last 3 months)
Found on November 9
ONT - Jacksonville
$598 → $77
87%
Found on November 9
ONT - Managua
$960 → $128
87%
Found on November 9
ONT - Vancouver
$600 → $83
86%
Found on November 9
ONT - Tokyo
$1,790 → $265
85%
Found on November 10
ONT - Paris
$1,480 → $227
85%
Check these nearby airports too
Looking for more options? These airports near ONT sometimes drop rare deals too:
Los Angeles International (LAX)
~9 rare deals/month
Palm Springs International (PSP)
~14 rare deals/month
John Wayne (SNA)
~10 rare deals/month
If you’re flexible with departure cities, it’s worth keeping an eye on nearby airports — especially LAX and PSP for long-haul deal surprises.
Travel Trends: Popular Destinations from Ontario
Every month, we analyze search and booking data to see where travelers from Ontario are heading. Here are the current hot destinations from Ontario:
Top domestic destinations
These cities are seeing the most searches and bookings from Ontario this month.
Top international destinations
Travelers from Ontario 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: Frequently Asked Questions
Pro Tips for Finding Cheap Flights from Ontario
Finding the cheapest airfare from Ontario 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!
Explore More Destinations from Ontario
Looking for more options? Here are some popular routes and related travel deals:















