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ISM to SEA: distance & flight time
Kissimmee (Kissimmee Gateway Airport) → Seattle (Seattle Tacoma International Airport)
2,551 mi
4,106 km · 2,217 nm
5h 28m
estimated nonstop flight time
-3h
time difference · heading northwest
See live ISM→SEA fares Phone-only fares on this route — call free
Flight time details
2,551 miles nonstop takes roughly 5h 28m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 3-hour time set-back when reading arrival times on your ticket.
The two airports
- ISM — Kissimmee Gateway Airport · Kissimmee, United States
- SEA — Seattle Tacoma International Airport · Seattle, 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
Near SEA
- RNT · Renton Municipal Airport5 mi away
- BFI · Boeing Field King County International Airport6 mi away
- TIW · Tacoma Narrows Airport18 mi away
- PWT · Bremerton National Airport21 mi away
Frequently asked questions
How far is ISM from SEA?
The flight distance from Kissimmee (ISM) to Seattle (SEA) is 2,551 miles (4,106 km, 2,217 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from ISM to SEA?
A nonstop flight takes about 5h 28m 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 ISM to SEA?
Nonstop service on ISM–SEA 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 5h 28m nonstop estimate.
What is the time difference between Kissimmee and Seattle?
Seattle is 3 hours behind Kissimmee.
What is the cheapest way to fly from ISM to SEA?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on ISM–SEA that never appear on search engines, with no booking fees.
Why are some ISM to SEA fares phone-only?
Consolidator contracts let us sell certain ISM–SEA 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.