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SUS to GAI: distance & flight time
Null (Spirit of St Louis Airport) → Gaithersburg (Montgomery County Airpark)
725 mi
1,167 km · 630 nm
2h 3m
estimated nonstop flight time
+1h
time difference · heading east
See live SUS→GAI fares Phone-only fares on this route — call free
Flight time details
725 miles nonstop takes roughly 2h 3m gate to gate, flying east. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time gain when reading arrival times on your ticket.
The two airports
- SUS — Spirit of St Louis Airport · Null, 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 SUS
- STL · St Louis Lambert International Airport16 mi away
- ALN · St Louis Regional Airport36 mi away
- BLV · Scott AFB/Midamerica Airport45 mi away
- JEF · Jefferson City Memorial Airport81 mi away
Near GAI
Frequently asked questions
How far is SUS from GAI?
The flight distance from Null (SUS) to Gaithersburg (GAI) is 725 miles (1,167 km, 630 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from SUS to GAI?
A nonstop flight takes about 2h 3m 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 Null and Gaithersburg?
Gaithersburg is 1 hour ahead of Null.
What is the cheapest way to fly from SUS to GAI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on SUS–GAI that never appear on search engines, with no booking fees.