George Bush Intcntl/Houston ⇄ Seattle-Tacoma International IAH–SEA
Airlines flew 4,176 flights between George Bush Intcntl/Houston IAH in Houston, TX and Seattle-Tacoma International SEA in Seattle, WA in the twelve months to July 2026, both directions together: 613,614 passengers in 711,149 seats, 86% of them filled, and 1,493,385 pounds of freight. 1,874 miles, about 253 minutes in the air, on 4 airlines: United Air Lines Inc. (2,466), Alaska Airlines Inc. (1,694), Atlas Air Inc. (15), Air Transport International (1). Planning to fly it yourself? The weather and winds along this route right now.
Flights by month both directions
By month, as a table
| flights | |
|---|---|
| 1/25 | 248 |
| 2/25 | 224 |
| 3/25 | 300 |
| 4/25 | 297 |
| 5/25 | 373 |
| 6/25 | 443 |
| 7/25 | 460 |
| 8/25 | 452 |
| 9/25 | 399 |
| 10/25 | 354 |
| 11/25 | 297 |
| 12/25 | 339 |
| 1/26 | 269 |
| 2/26 | 224 |
| 3/26 | 284 |
| 4/26 | 300 |
| 5/26 | 365 |
| 6/26 | 433 |
| 7/26 | 460 |
Passengers by month
By month, as a table
| passengers | |
|---|---|
| 1/25 | 37,982 |
| 2/25 | 34,144 |
| 3/25 | 42,776 |
| 4/25 | 43,352 |
| 5/25 | 53,307 |
| 6/25 | 65,828 |
| 7/25 | 72,116 |
| 8/25 | 67,781 |
| 9/25 | 54,945 |
| 10/25 | 49,675 |
| 11/25 | 42,268 |
| 12/25 | 48,114 |
| 1/26 | 38,327 |
| 2/26 | 32,992 |
| 3/26 | 43,492 |
| 4/26 | 45,302 |
| 5/26 | 53,566 |
| 6/26 | 65,087 |
| 7/26 | 72,065 |
The airlines twelve months, both directions
| Airline | Flights | Passengers | Seats filled | Service |
|---|---|---|---|---|
| United Air Lines Inc. UA | 2,466 | 356,290 | 87% | charter passenger service, scheduled passenger service |
| Alaska Airlines Inc. AS | 1,694 | 257,324 | 86% | scheduled passenger service |
| Atlas Air Inc. 5Y | 15 | 0 | 0% | charter passenger service |
| Air Transport International 8C | 1 | 0 | charter cargo service |
The aircraft as the airlines report their types
| Aircraft | Flights | Seats a flight | Passengers |
|---|---|---|---|
| Boeing B737 Max 900 | 1,275 | 178 | 195,198 |
| Boeing 737-900ER | 1,050 | 178 | 160,963 |
| Boeing 737-800 | 673 | 165 | 97,815 |
| Airbus Industrie A320-100/200 | 418 | 150 | 55,982 |
| Boeing 737-900 | 309 | 179 | 48,130 |
| Boeing B737 Max 800 | 216 | 166 | 30,129 |
| Airbus Industrie A319 | 205 | 126 | 23,730 |
| Boeing 747-400 | 13 | 246 | 0 |
| Boeing 737-700/700LR/Max 7 | 11 | 126 | 1,211 |
| Boeing 767-300/300ER | 3 | 162 | 0 |
| Boeing 777-300/300ER/333ER | 2 | 350 | 374 |
| Airbus Industrie A321-200n | 1 | 200 | 82 |
IAH → SEA this direction alone · flown January 2025 to July 2026
2,091 flights of 2,083 scheduled, 306,967 passengers in 356,896 seats, 843,080 pounds of freight, 247,269 pounds of mail. United Air Lines Inc. 1,234; Alaska Airlines Inc. 848; Atlas Air Inc. 9.
SEA → IAH this direction alone · flown January 2025 to July 2026
2,085 flights of 2,089 scheduled, 306,647 passengers in 354,253 seats, 650,305 pounds of freight, 149,271 pounds of mail. United Air Lines Inc. 1,232; Alaska Airlines Inc. 846; Atlas Air Inc. 6; Air Transport International 1.
Source: the Bureau of Transportation Statistics' T-100 Segment table (all carriers). A flight is one departure performed on this segment; seats and passengers are the airlines' own monthly reports; "seats filled" is passengers divided by seats. The miles are the DOT's great-circle distance. Both ends: George Bush Intcntl/Houston IAH and Seattle-Tacoma International SEA; all routes.