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ONT to PMH: distance & flight time
Ontario (Ontario International Airport) → Portsmouth (Greater Portsmouth Regional Airport)
1,948 mi
3,134 km · 1,692 nm
4h 17m
estimated nonstop flight time
—
time difference · heading east
See live ONT→PMH fares Phone-only fares on this route — call free
Flight time details
1,948 miles nonstop takes roughly 4h 17m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Both airports share the same local time, so schedules read exactly as flown.
The two airports
- ONT — Ontario International Airport · Ontario, United States
- PMH — Greater Portsmouth Regional Airport · Portsmouth, 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 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 PMH
- HTS · Tri-State/Milton J. Ferguson Field36 mi away
- ATO · Ohio University Snyder Field42 mi away
- ILN · Wilmington Airpark65 mi away
- LCK · Rickenbacker International Airport67 mi away
Frequently asked questions
How far is ONT from PMH?
The flight distance from Ontario (ONT) to Portsmouth (PMH) is 1,948 miles (3,134 km, 1,692 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ONT to PMH?
A nonstop flight takes about 4h 17m 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 cheapest way to fly from ONT to PMH?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ONT–PMH that never appear on search engines, with no booking fees.