Back to CalculatorRoute ID: SEA-SOF
Flight Distance from Seattle (SEA) to Sofia (SOF)
Comprehensive aviation route data, direct distance, flight duration, CO₂ footprint, passport visa rules and interactive map.
Origin Airport
SEAKSEA
Seattle, United States
Seattle–Tacoma International Airport
Great Circle Path
9,441 km5,866 miles • 5,098 NM
Destination Airport
LBSFSOF
Sofia, Bulgaria
Sofia Airport
Direct Distance
9,441 km
5,866 Statute Miles
5,098 Nautical Miles
Commercial Flight
11h 36m
Est. non-stop flight duration (~850 km/h cruising speed + buffer)
CO₂ Footprint
850 kg
Estimated carbon footprint per economy passenger (~90g CO₂/km)
Initial Heading
25° True
Initial compass bearing towards destination
Estimated Travel Duration by Aircraft Class
Commercial Jet (Boeing 787 / A350)
11h 36m
Speed: ~850 km/h (459 knots)
Business Jet (Gulfstream G650)
10h 46m
Speed: ~920 km/h (496 knots)
Turboprop Aircraft (ATR-72 / Q400)
18h 39m
Speed: ~520 km/h (280 knots)
Passport & Visa Entry Requirements
🇺🇸 United States→🌐 BG
This information is provided for general guidance only and does not replace official verification with an embassy, consulate, or the IATA Travel Centre before you travel.
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Flight Path & Geodetic Arc Map
Great Circle Flight Arc Path
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Departure Airport Specs
Seattle–Tacoma International Airport (SEA)
- City / Country: Seattle, United States
- ICAO Code: KSEA
- Coordinates: 47.4479°, -122.3103°
- Timezone: America/Los_Angeles
- Elevation: 433 ft
Arrival Airport Specs
Sofia Airport (SOF)
- City / Country: Sofia, Bulgaria
- ICAO Code: LBSF
- Coordinates: 42.6964°, 23.4177°
- Timezone: Europe/Sofia
- Elevation: 1742 ft
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