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BWI to ONT: distance & flight time
Baltimore (Baltimore/Washington International Thurgood Marshall Airport) → Ontario (Ontario International Airport)
2,278 mi
3,666 km · 1,979 nm
4h 56m
estimated nonstop flight time
-3h
time difference · heading west
See live BWI→ONT fares Phone-only fares on this route — call free
Flight time details
2,278 miles nonstop takes roughly 4h 56m gate to gate, flying west. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 3-hour time set-back when reading arrival times on your ticket.
The two airports
- BWI — Baltimore/Washington International Thurgood Marshall Airport · Baltimore, United States
- 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 BWI
- DCA · Ronald Reagan Washington National Airport30 mi away
- IAD · Washington Dulles International Airport45 mi away
- FME · Tipton Airport8 mi away
- ANP · Lee Airport17 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 BWI from ONT?
The flight distance from Baltimore (BWI) to Ontario (ONT) is 2,278 miles (3,666 km, 1,979 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from BWI to ONT?
A nonstop flight takes about 4h 56m 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 Baltimore and Ontario?
Ontario is 3 hours behind Baltimore.
What is the cheapest way to fly from BWI to ONT?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on BWI–ONT that never appear on search engines, with no booking fees.