IAH to SEA: Distance and Flight Time
The distance from George Bush Intercontinental Airport (IAH) to Seattle–Tacoma International Airport (SEA) is 3,013 km (1,872 mi). A typical nonstop flight covers it in about 4h 15m, heading northwest. The distance is the same in either direction (SEA to IAH).
How far is it from Houston to Seattle?
The great-circle distance between George Bush Intercontinental Airport (IAH) and Seattle–Tacoma International Airport (SEA) is 3,013 km (1,872 mi, 1,627 nautical miles). That is the straight-line distance; a real flight is a little longer because of air-traffic routing.
How long is the flight from IAH to SEA?
A nonstop flight typically takes about 4h 15m. This is an estimate from the distance; actual block times depend on the aircraft, winds and the exact routing. SEA is roughly northwest of IAH.
How is the IAH to SEA route written in code?
The pair is written IAH-SEA in IATA codes and KIAH-KSEA in ICAO codes, the form used on a flight plan. George Bush Intercontinental Airport is IAH (KIAH), Seattle–Tacoma International Airport is SEA (KSEA).
| IAH | SEA | |
|---|---|---|
| Airport | George Bush Intercontinental Airport | Seattle–Tacoma International Airport |
| ICAO code | KIAH | KSEA |
| Country | United States | United States |
| Elevation | 97 ft | 433 ft |
| Rank by connections | #49 | #67 |
Both ICAO codes start with K, the prefix ICAO assigns to the contiguous United States, so this is a route inside one ICAO region. How ICAO prefixes are laid out.
SEA sits 336 ft (102 m) higher than IAH, which is a real difference in air density on takeoff.
Airlines flying IAH to SEA
2 airlines appear on this route in the open route dataset, 2 of them still listed as active. Each row gives the IATA code, the ICAO code and the radio callsign, which is what an air traffic controller hears:
| IATA | Airline | ICAO | Callsign | Status |
|---|---|---|---|---|
| AS | Alaska Airlines | ASA | Alaska | Active |
| UA | United Airlines | UAL | United | Active |
A further 2 carriers sell this pair as a codeshare without operating it: CM, DL.
Route and carrier data comes from the OpenFlights open dataset, regenerated here on . It is a historical snapshot of scheduled connections, not a live schedule, and it includes codeshare listings, so some carriers shown may no longer operate the route or exist. How we build this · Data and sources.
Frequently asked questions
How far is Houston from Seattle?
George Bush Intercontinental Airport (IAH) and Seattle–Tacoma International Airport (SEA) are 3,013 km (1,872 mi, 1,627 nautical miles) apart in a straight line.
How long is the flight from IAH to SEA?
A typical nonstop flight between IAH and SEA takes about 4h 15m. Actual times vary with aircraft type, winds and routing.
What direction is SEA from IAH?
Seattle–Tacoma International Airport (SEA) lies roughly northwest of George Bush Intercontinental Airport (IAH).
Which airlines fly IAH to SEA?
2 airlines appear on the IAH-SEA route in the open dataset, including Alaska Airlines, United Airlines.
Related routes
Other routes from Houston (IAH):
Other routes from Seattle (SEA):
IAH airport code · SEA airport code · Busiest airports worldwide