Need help booking?
Unpublished phone-only deals available
SFO to GAI: distance & flight time
San Francisco (San Francisco International Airport) → Gaithersburg (Montgomery County Airpark)
2,425 mi
3,903 km · 2,107 nm
5h 13m
estimated nonstop flight time
+3h
time difference · heading east
See live SFO→GAI fares Phone-only fares on this route — call free
Flight time details
2,425 miles nonstop takes roughly 5h 13m gate to gate, flying east. 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
- SFO — San Francisco International Airport · San Francisco, 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 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
Near GAI
Frequently asked questions
How far is SFO from GAI?
The flight distance from San Francisco (SFO) to Gaithersburg (GAI) 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 SFO to GAI?
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 San Francisco and Gaithersburg?
Gaithersburg is 3 hours ahead of San Francisco.
What is the cheapest way to fly from SFO to GAI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SFO–GAI that never appear on search engines, with no booking fees.