The cheapest times to fly from EAS to ONT are
- December 3rd to June 3rd (except the week of December 17th)
based on data collected exclusively by Champion Traveler across tens of millions of flights. Among all the dates above, the very cheapest time to fly from EAS to ONT is early to mid February. Prices can be as high as $6898 for Wednesday flights during early to mid August, or as low as $1510 for Saturday flights around early to mid February.
When to Fly to Ontario
Flying from San Sebastian (EAS) to Ontario, CA (ONT) will usually cost between $1613 to $6898 per person if booking more than four weeks in advance. On average the very cheapest time to fly is early to mid February with an average ticket price of $1638. Due to high demand the most expensive time to fly is early to mid August, with an average price of $6062. Planning your trip to low-cost times can easily save you $4424 on economy flights and even more on first-class flights. Generally, any price below $2080 can be considered a good price for a round-trip EAS to ONT flight.
See below for a graph of average weekly prices for the EAS to ONT route. All prices are for round-trip tickets in USD.
Compared to other flights, the EAS to ONT flight is more expensive than the average and costs more than the average flight leaving from Donostia-San Sebastian. The average price per mile (for a direct flight) is $0.23, which is below average.
Flight Prices by Day of the Week
Saturday is usually the cheapest day to fly to ONT, and Thursday the cheapest day to fly back into EAS. Wednesdays are the most expensive days to fly to Ontario, and Saturdays are the most expensive days to return to Donostia-San Sebastian. Selecting flights on the least expensive days could save you up to $818 (9%) on this flight.
Departing prices are for round-trip flights returning on the day of departure. For example, a flight departing on Saturday and returning a week later will cost an average of $2119. Return trip prices are from the ONT to EAS flight, and often highlight the quality of our data in showing the same trend.
Departing Prices by Day
Return Trip Prices by Day
Nonstop Flights and Layovers
Travelers looking to fly from EAS to ONT can generally find a 2-layover flight. Because there is not usually a direct flight option the real-world direct flight time of 11 hour 18 minutes may not be realistic.
Alternative Nearby Airports
Champion Traveler tells you which airports are nearby and whether tickets might be cheaper alternative airports nearby. Sometimes it’s worth it to fly into a closer airport and then commute to your destination. Remember that there is not usually a nonstop flight from EAS to ONT while comparing.
- 30 miles (48 km) away from ONT
- Usually 67.16% less expensive than ONT
- 2-layover flights available
- 47 miles (76 km) away from ONT
- Usually 66.17% less expensive than ONT
- 1-layover flights available
- 94 miles (151 km) away from ONT
- Usually 52.30% less expensive than ONT
- 2-layover flights available
Flight Hacking EAS to ONT
Flight hacking is when you book two tickets instead of a layover, sometimes with different airlines. You will need to either bring only a carry-on bag (highly recommended) or leave yourself plenty of time to go through security again. Flight hacking is completely allowed, but airlines don’t always tell you the cheapest way to get from EAS to ONT — but Champion Traveler does!
- Price for both tickets: $972
- Average savings: $1108 (53.26%)
- Price for both tickets: $1027
- Average savings: $1053 (50.61%)
- Price for both tickets: $1035
- Average savings: $1045 (50.23%)
Flight Questions Answered
Still have questions about flying from EAS to ONT? We’ve got answers.
Which airlines fly this route?
You can find 6 major airlines flying this route most often: American, British Airways, Finnair, Iberia, JetBlue, United, and potentially more during busy seasons.
How far away is it from Ontario International Airport to San Sebastian Airport?
The distance between the two airports is roughly 5732 miles or 9225 kilometers.
How long does it take to fly from EAS to ONT?
The real-world flight time for a nonstop EAS to ONT flight is about 11 hour 18 minutes.
How many flights go between San Sebastian and Ontario, CA?
It depends on the day of the week and the date, but a typical day might have around 7 available flights from EAS to ONT.
Airport Location Info
|Origination airport name||San Sebastian Airport|
|Destination airport name||Ontario International Airport|
|Country||the United States|
Please note that while we’ve worked hard to analyzed tens of millions of flights to get you this data, we do not calculate current live prices or guarantee pricing. Please see our partners using the links above for current offers.