Airport Comparison
| SEA | UNI | |
|---|---|---|
| Airport Name | Seattle-Tacoma International Airport | Union Island International Airport |
| IATA Code | SEA | UNI |
| ICAO Code | KSEA | TVSU |
| City | Seattle | Union Island |
| Country | United States | Saint Vincent |
| Timezone | America/Los_Angeles | America/St_Vincent |
| Elevation | 432 ft | 16 ft |
| Coordinates | 47.450000, -122.310000 | 12.600000, -61.410000 |
Seattle (SEA) to Union Island (UNI) Flight Distance
The flight distance from Seattle-Tacoma International Airport (SEA) in Seattle, United States to Union Island International Airport (UNI) in Union Island, Saint Vincent is 6,806 kilometers (4,229 miles / 3,675 nautical miles). The estimated flight time for this route is approximately 9h, flying east southeast at a heading of 103°.
This is a long-haul route typically operated by wide-body aircraft such as the Boeing 777 or Airbus A350. Full meal service, in-flight entertainment, and comfort amenities are standard.
This is an international route connecting United States with Saint Vincent. Travelers should check visa requirements, customs regulations, and any travel advisories before booking.
Time zone information: When it's 17:30 in Seattle, it's 21:30 in Union Island. The 4-hour time difference may cause some jet lag. Most travelers adjust within a day or two.
The return flight from Union Island (UNI) to Seattle (SEA) follows a heading of 318° (northwest). Actual flight times may vary depending on wind conditions, air traffic, and the specific aircraft used.
For more information about these airports, visit the Seattle-Tacoma International Airport (SEA) and Union Island International Airport (UNI) detail pages, or use our flight duration calculator to compare other routes.