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ONO to GAI: distance & flight time
Ontario (Ontario Municipal Airport) → Gaithersburg (Montgomery County Airpark)
2,066 mi
3,324 km · 1,795 nm
4h 31m
estimated nonstop flight time
+2h
time difference · heading east
See live ONO→GAI fares Phone-only fares on this route — call free
Flight time details
2,066 miles nonstop takes roughly 4h 31m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 2-hour time gain when reading arrival times on your ticket.
The two airports
- ONO — Ontario Municipal Airport · Ontario, United States
- GAI — Montgomery County Airpark · Gaithersburg, 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 ONO
- BOI · Boise Air Terminal/Gowen Field50 mi away
- BKE · Baker City Municipal Airport69 mi away
- MYL · McCall Municipal Airport75 mi away
- MUO · Mountain Home Air Force Base88 mi away
Near GAI
Frequently asked questions
How far is ONO from GAI?
The flight distance from Ontario (ONO) to Gaithersburg (GAI) is 2,066 miles (3,324 km, 1,795 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ONO to GAI?
A nonstop flight takes about 4h 31m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from ONO to GAI?
Nonstop service on ONO–GAI depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 4h 31m nonstop estimate.
What is the time difference between Ontario and Gaithersburg?
Gaithersburg is 2 hours ahead of Ontario.
What is the cheapest way to fly from ONO to GAI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ONO–GAI that never appear on search engines, with no booking fees.
Why are some ONO to GAI fares phone-only?
Consolidator contracts let us sell certain ONO–GAI tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.