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SDM to GAI: distance & flight time
San Diego (Brown Field Municipal Airport) → Gaithersburg (Montgomery County Airpark)
2,257 mi
3,632 km · 1,961 nm
4h 53m
estimated nonstop flight time
+3h
time difference · heading northeast
See live SDM→GAI fares Phone-only fares on this route — call free
Flight time details
2,257 miles nonstop takes roughly 4h 53m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 3-hour time gain when reading arrival times on your ticket.
The two airports
- SDM — Brown Field Municipal Airport · San Diego, 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 SDM
Near GAI
Frequently asked questions
How far is SDM from GAI?
The flight distance from San Diego (SDM) to Gaithersburg (GAI) is 2,257 miles (3,632 km, 1,961 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SDM to GAI?
A nonstop flight takes about 4h 53m 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 San Diego and Gaithersburg?
Gaithersburg is 3 hours ahead of San Diego.
What is the cheapest way to fly from SDM to GAI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SDM–GAI that never appear on search engines, with no booking fees.