Need help booking?
Unpublished phone-only deals available
ISM to IAD: distance & flight time
Kissimmee (Kissimmee Gateway Airport) → Washington (Washington Dulles International Airport)
771 mi
1,240 km · 670 nm
2h 9m
estimated nonstop flight time
Same time
time difference · heading north
See live ISM→IAD fares Phone-only fares on this route — call free
Flight time details
771 miles nonstop takes roughly 2h 9m gate to gate, flying north. 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
- ISM — Kissimmee Gateway Airport · Kissimmee, United States
- IAD — Washington Dulles International Airport · Washington, 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 ISM
- MCO · Orlando International Airport12 mi away
- ORL · Orlando Executive Airport19 mi away
- GIF · Winter Haven Regional Airport - Gilbert Field25 mi away
- TPA · Tampa International Airport70 mi away
Frequently asked questions
How far is ISM from IAD?
The flight distance from Kissimmee (ISM) to Washington (IAD) is 771 miles (1,240 km, 670 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ISM to IAD?
A nonstop flight takes about 2h 9m 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 cheapest way to fly from ISM to IAD?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ISM–IAD that never appear on search engines, with no booking fees.