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GAI to CTH: distance & flight time
Gaithersburg (Montgomery County Airpark) → Coatesville (Chester County G O Carlson Airport)
89 mi
143 km · 77 nm
42m
estimated nonstop flight time
Same time
time difference · heading northeast
See live GAI→CTH fares Phone-only fares on this route — call free
Flight time details
89 miles nonstop takes roughly 42m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Both airports share the same local time, so schedules read exactly as flown.
The two airports
- GAI — Montgomery County Airpark · Gaithersburg, United States
- CTH — Chester County G O Carlson Airport · Coatesville, 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 CTH
- PHL · Philadelphia International Airport34 mi away
- ILG · New Castle Airport25 mi away
- LNS · Lancaster Airport25 mi away
- RDG · Reading Regional Carl A Spaatz Field28 mi away
Frequently asked questions
How far is GAI from CTH?
The flight distance from Gaithersburg (GAI) to Coatesville (CTH) is 89 miles (143 km, 77 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from GAI to CTH?
A nonstop flight takes about 42m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
Are there nonstop flights from GAI to CTH?
Nonstop service on GAI–CTH depends on the season and the day of week. Run the fare search on this page with the nonstop filter applied to see current direct options; when there is no nonstop, a single connection through a carrier hub adds roughly 2–4 hours to the 42m nonstop estimate.
What is the cheapest way to fly from GAI to CTH?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on GAI–CTH that never appear on search engines, with no booking fees.
Why are some GAI to CTH fares phone-only?
Consolidator contracts let us sell certain GAI–CTH tickets below the price airlines permit us to publish online, so those fares can only be quoted over the phone. Call the travel desk and an agent will check phone-only inventory for your dates.