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GAI to SFO: distance & flight time
Gaithersburg (Montgomery County Airpark) → San Francisco (San Francisco International Airport)
2,425 mi
3,903 km · 2,107 nm
5h 13m
estimated nonstop flight time
-3h
time difference · heading west
See live GAI→SFO fares Phone-only fares on this route — call free
Flight time details
2,425 miles nonstop takes roughly 5h 13m 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
- GAI — Montgomery County Airpark · Gaithersburg, United States
- SFO — San Francisco International Airport · San Francisco, 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 GAI
Near SFO
- SQL · San Carlos Airport10 mi away
- HAF · Half Moon Bay Airport10 mi away
- OAK · Metropolitan Oakland International Airport11 mi away
- NGZ · Alameda Naval Air Station12 mi away
Frequently asked questions
How far is GAI from SFO?
The flight distance from Gaithersburg (GAI) to San Francisco (SFO) is 2,425 miles (3,903 km, 2,107 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GAI to SFO?
A nonstop flight takes about 5h 13m 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 Gaithersburg and San Francisco?
San Francisco is 3 hours behind Gaithersburg.
What is the cheapest way to fly from GAI to SFO?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GAI–SFO that never appear on search engines, with no booking fees.