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ONT to EAS: distance & flight time
Ontario (Ontario International Airport) → San Sebastian (San Sebastian Airport)
5,733 mi
9,227 km · 4,982 nm
11h 43m
estimated nonstop flight time
+9h
time difference · heading northeast
See live ONT→EAS fares Phone-only fares on this route — call free
Flight time details
5,733 miles nonstop takes roughly 11h 43m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 9-hour time gain when reading arrival times on your ticket.
The two airports
- ONT — Ontario International Airport · Ontario, United States
- EAS — San Sebastian Airport · San Sebastian, Spain
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near ONT
- CCB · Cable Airport6 mi away
- CNO · Chino Airport6 mi away
- LAX · Los Angeles International Airport47 mi away
- RAL · Riverside Municipal Airport11 mi away
Near EAS
- BIQ · Biarritz-Anglet-Bayonne Airport15 mi away
- PNA · Pamplona Airport41 mi away
- BIO · Bilbao Airport56 mi away
- VIT · Vitoria/Foronda Airport57 mi away
Frequently asked questions
How far is ONT from EAS?
The flight distance from Ontario (ONT) to San Sebastian (EAS) is 5,733 miles (9,227 km, 4,982 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ONT to EAS?
A nonstop flight takes about 11h 43m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
What is the time difference between Ontario and San Sebastian?
San Sebastian is 9 hours ahead of Ontario.
What is the cheapest way to fly from ONT to EAS?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ONT–EAS that never appear on search engines, with no booking fees.