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BIL to GAI: distance & flight time
Billings (Billings Logan International Airport) → Gaithersburg (Montgomery County Airpark)
1,651 mi
2,657 km · 1,435 nm
3h 42m
estimated nonstop flight time
+2h
time difference · heading east
See live BIL→GAI fares Phone-only fares on this route — call free
Flight time details
1,651 miles nonstop takes roughly 3h 42m 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
- BIL — Billings Logan International Airport · Billings, 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 BIL
- COD · Yellowstone Regional Airport92 mi away
- LVM · Mission Field92 mi away
- LWT · Lewistown Municipal Airport96 mi away
- SHR · Sheridan County Airport105 mi away
Near GAI
Frequently asked questions
How far is BIL from GAI?
The flight distance from Billings (BIL) to Gaithersburg (GAI) is 1,651 miles (2,657 km, 1,435 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from BIL to GAI?
A nonstop flight takes about 3h 42m 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 Billings and Gaithersburg?
Gaithersburg is 2 hours ahead of Billings.
What is the cheapest way to fly from BIL to GAI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on BIL–GAI that never appear on search engines, with no booking fees.