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UTP to ONT: distance & flight time
Pattaya (U-Tapao International Airport) → Ontario (Ontario International Airport)
8,331 mi
13,408 km · 7,240 nm
16h 48m
estimated nonstop flight time
-14h
time difference · heading northeast
See live UTP→ONT fares Phone-only fares on this route — call free
Flight time details
8,331 miles nonstop takes roughly 16h 48m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 14-hour time set-back when reading arrival times on your ticket.
The two airports
- UTP — U-Tapao International Airport · Pattaya, Thailand
- ONT — Ontario International Airport · Ontario, United States
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 UTP
- HHQ · Hua Hin Airport71 mi away
- BKK · Suvarnabhumi Airport71 mi away
- DMK · Don Mueang International Airport89 mi away
- TDX · Trat Airport93 mi away
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
Frequently asked questions
How far is UTP from ONT?
The flight distance from Pattaya (UTP) to Ontario (ONT) is 8,331 miles (13,408 km, 7,240 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from UTP to ONT?
A nonstop flight takes about 16h 48m 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 Pattaya and Ontario?
Ontario is 14 hours behind Pattaya.
What is the cheapest way to fly from UTP to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on UTP–ONT that never appear on search engines, with no booking fees.