Need help booking?
Unpublished phone-only deals available
HRI to GAI: distance & flight time
Mattala (Mattala Rajapaksa International Airport) → Gaithersburg (Montgomery County Airpark)
9,003 mi
14,489 km · 7,823 nm
18h 7m
estimated nonstop flight time
-9.5h
time difference · heading north
See live HRI→GAI fares Phone-only fares on this route — call free
Flight time details
9,003 miles nonstop takes roughly 18h 7m gate to gate, flying north. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 9.5-hour time set-back when reading arrival times on your ticket.
The two airports
- HRI — Mattala Rajapaksa International Airport · Mattala, Sri Lanka
- 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 HRI
- WRZ · Weerawila Airport8 mi away
- KCT · Koggala Airport59 mi away
- ADP · Ampara Airport81 mi away
- RML · Colombo Ratmalana Airport93 mi away
Near GAI
Frequently asked questions
How far is HRI from GAI?
The flight distance from Mattala (HRI) to Gaithersburg (GAI) is 9,003 miles (14,489 km, 7,823 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from HRI to GAI?
A nonstop flight takes about 18h 7m 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 Mattala and Gaithersburg?
Gaithersburg is 9.5 hours behind Mattala.
What is the cheapest way to fly from HRI to GAI?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on HRI–GAI that never appear on search engines, with no booking fees.