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Cheap Flights from Seattle (SEA) to Sofia (SOF)

Compare Seattle / Tacoma International to Sofia flight deals

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Flight deals from Seattle / Tacoma International to Sofia

Looking for a cheap last-minute deal or the best return flight from Seattle / Tacoma International Airport to Sofia Airport? If you want to travel next month, return fares start from $1,302. Find the lowest prices on one-way and return tickets right here.
Sofia.$1,072 per passenger.Departing Tue, 1 Dec, returning Thu, 10 Dec.Return flight with KLM.Outbound indirect flight with KLM, departs from Seattle / Tacoma International on Tue, 1 Dec, arriving in Sofia.Inbound indirect flight with KLM, departs from Sofia on Thu, 10 Dec, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,072, select.
Sofia.$1,086 per passenger.Departing Wed, 16 Sep, returning Wed, 23 Sep.Return flight with Turkish Airlines.Outbound indirect flight with Turkish Airlines, departs from Seattle / Tacoma International on Wed, 16 Sep, arriving in Sofia.Inbound indirect flight with Turkish Airlines, departs from Sofia on Wed, 23 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,086, select.
Sofia.$1,087 per passenger.Departing Tue, 1 Sep, returning Wed, 28 Oct.Return flight with Turkish Airlines.Outbound indirect flight with Turkish Airlines, departs from Seattle / Tacoma International on Tue, 1 Sep, arriving in Sofia.Inbound indirect flight with Turkish Airlines, departs from Sofia on Wed, 28 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,087, select.
Sofia.$1,111 per passenger.Departing Sun, 23 Aug, returning Thu, 15 Oct.Return flight with Turkish Airlines.Outbound indirect flight with Turkish Airlines, departs from Seattle / Tacoma International on Sun, 23 Aug, arriving in Sofia.Inbound indirect flight with Turkish Airlines, departs from Sofia on Thu, 15 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,111, select.
Sofia.$1,117 per passenger.Departing Tue, 25 Aug, returning Tue, 22 Sep.Return flight with Turkish Airlines.Outbound indirect flight with Turkish Airlines, departs from Seattle / Tacoma International on Tue, 25 Aug, arriving in Sofia.Inbound indirect flight with Turkish Airlines, departs from Sofia on Tue, 22 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,117, select.
Sofia.$1,129 per passenger.Departing Thu, 8 Apr, returning Fri, 16 Apr.Return flight with Lufthansa.Outbound indirect flight with Lufthansa, departs from Seattle / Tacoma International on Thu, 8 Apr, arriving in Sofia.Inbound indirect flight with Lufthansa, departs from Sofia on Fri, 16 Apr, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,129, select.
Sofia.$1,152 per passenger.Departing Wed, 30 Sep, returning Sat, 7 Nov.Return flight with Lufthansa.Outbound indirect flight with Lufthansa, departs from Seattle / Tacoma International on Wed, 30 Sep, arriving in Sofia.Inbound indirect flight with Lufthansa, departs from Sofia on Sat, 7 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,152, select.
Sofia.$1,171 per passenger.Departing Tue, 7 Jul, returning Thu, 20 Aug.Return flight with Lufthansa.Outbound indirect flight with Lufthansa, departs from Seattle / Tacoma International on Tue, 7 Jul, arriving in Sofia.Inbound indirect flight with Lufthansa, departs from Sofia on Thu, 20 Aug, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,171, select.
Sofia.$1,172 per passenger.Departing Thu, 1 Oct, returning Sat, 24 Oct.Return flight with Turkish Airlines.Outbound indirect flight with Turkish Airlines, departs from Seattle / Tacoma International on Thu, 1 Oct, arriving in Sofia.Inbound indirect flight with Turkish Airlines, departs from Sofia on Sat, 24 Oct, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,172, select.
Sofia.$1,172 per passenger.Departing Thu, 1 Oct, returning Sat, 7 Nov.Return flight with Turkish Airlines.Outbound indirect flight with Turkish Airlines, departs from Seattle / Tacoma International on Thu, 1 Oct, arriving in Sofia.Inbound indirect flight with Turkish Airlines, departs from Sofia on Sat, 7 Nov, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,172, select.
Sofia.$1,178 per passenger.Departing Sun, 9 Aug, returning Mon, 24 Aug.Return flight with Lufthansa.Outbound indirect flight with Lufthansa, departs from Seattle / Tacoma International on Sun, 9 Aug, arriving in Sofia.Inbound indirect flight with Lufthansa, departs from Sofia on Mon, 24 Aug, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,178, select.
Sofia.$1,190 per passenger.Departing Tue, 21 Jul, returning Fri, 4 Sep.Return flight with Lufthansa.Outbound indirect flight with Lufthansa, departs from Seattle / Tacoma International on Tue, 21 Jul, arriving in Sofia.Inbound indirect flight with Lufthansa, departs from Sofia on Fri, 4 Sep, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,190, select.
Sofia.$1,302 per passenger.Departing Mon, 6 Jul, returning Sun, 19 Jul.Return flight with Turkish Airlines.Outbound indirect flight with Turkish Airlines, departs from Seattle / Tacoma International on Mon, 6 Jul, arriving in Sofia.Inbound indirect flight with Turkish Airlines, departs from Sofia on Sun, 19 Jul, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,302, select.
Sofia.$1,542 per passenger.Departing Sat, 27 Jun, returning Sat, 18 Jul.Return flight with Turkish Airlines.Outbound indirect flight with Turkish Airlines, departs from Seattle / Tacoma International on Sat, 27 Jun, arriving in Sofia.Inbound indirect flight with Turkish Airlines, departs from Sofia on Sat, 18 Jul, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,542, select.
Sofia.$1,721 per passenger.Departing Sun, 28 Jun, returning Fri, 21 Aug.Return flight with Lufthansa.Outbound indirect flight with Lufthansa, departs from Seattle / Tacoma International on Sun, 28 Jun, arriving in Sofia.Inbound indirect flight with Lufthansa, departs from Sofia on Fri, 21 Aug, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $1,721, select.
Sofia.$2,041 per passenger.Departing Sat, 20 Jun, returning Sat, 27 Jun.Return flight with Turkish Airlines.Outbound indirect flight with Turkish Airlines, departs from Seattle / Tacoma International on Sat, 20 Jun, arriving in Sofia.Inbound indirect flight with Turkish Airlines, departs from Sofia on Sat, 27 Jun, arriving in Seattle / Tacoma International.Price includes taxes and charges.From $2,041, select.

Find the cheapest month to fly from Seattle / Tacoma International to Sofia

We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Seattle / Tacoma International to Sofia flights are currently cheapest in December.
Jun
from $2,041
Jul
from $1,302
Aug
from $1,178
Sep
from $1,086
Oct
from $1,172
Nov
Find prices
Dec
from $1,072
Jan
Find prices
Feb
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Mar
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Apr
from $1,129
May
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Seattle / Tacoma International to Sofia: Alternative routes

Compare routes from Seattle / Tacoma International to Sofia below. You may find an airport to fly into that's cheaper, faster, or easier than Sofia.

Sofia

7km from central Sofia
ClosestCheapest
from $1,072
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Seattle to Sofia: Flight information

The things to know before you go.
Cheapest flight found$1,072
Cheapest month to flyDecember

Finding cheap flights from Seattle / Tacoma International to Sofia: Frequently asked questions

The best price we found for a return flight from Seattle / Tacoma International to Sofia is $1,072. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
Currently, there are no airlines that fly direct from Seattle / Tacoma International to Sofia. But we found flights with one or more stops from $1,072.
As of June 2026, there are no flights flying from Seattle / Tacoma International to Sofia.
The cheapest month to fly from Seattle / Tacoma International to Sofia is usually December.
After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Seattle / Tacoma International Airport to Sofia Airport on Tuesday, 1 December 2026.
No airlines currently offer direct flights between Seattle / Tacoma International Airport and Sofia Airport. Most routes have one or more stops.
We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Sofia but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.
We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Sofia is around 40 days in advance, so don’t leave your flight to the last minute.
Currently, KLM offers the cheapest flight tickets to Sofia.

Travelling from Seattle / Tacoma International Airport (SEA) to Sofia Airport (SOF): what you need to know

  • Sofia's timezone is UTC+2, making Sofia ten hours ahead of Seattle.

  • To ensure you get on your SEA to SOF flight, leave plenty of time to navigate the airport and find your gate. Arriving two hours before international departures and an hour before domestic flights is the general rule.

  • During popular months such as July, it's best to get to the airport even earlier. Plan to arrive two hours before a domestic departure and four hours ahead of international flights whenever you're travelling during peak periods in general.

  • We make it a cinch to book a flight with a stopover. To see all your options for tickets from Seattle / Tacoma International Airport to Sofia Airport, deselect 'Direct flights only.' Then, choose a flight that has a stop long enough to visit your chosen city. Top stopovers between SEA and SOF include:

    • London Heathrow Airport

    • Amsterdam Schiphol Airport

    • Paris Charles de Gaulle Airport

How to find the cheapest flights from Seattle / Tacoma International Airport (SEA) to Sofia Airport (SOF)

  • At the moment, $458 is the lowest price we've found for a one-way Seattle / Tacoma International Airport to Sofia Airport flight. The best price for a return ticket is $1,072. Bear in mind that fares may change due to demand at the time of booking.

  • Don't wait until the last minute. You're more likely to find cheap tickets from SEA to SOF if you book early. Airlines often offer some amazing early bird rates.

  • If you can be flexible with your travel plans, use the 'Whole month' search function. It'll give you the cheapest price across every month when searching for your flight from Seattle / Tacoma International Airport to Sofia Airport.

  • You don't need to check back in every day to see if fares have gone down when you set up a Price Alert. We'll send you an update as soon as there's a better deal on cheap flights from SEA to SOF.

  • Tailor your trip with filters. Pick your preferred arrival and departure times, total journey duration and airlines. You can also sort results by 'Best,' 'Cheapest' or 'Fastest' flights from Seattle / Tacoma International Airport to Sofia Airport.

Handy information about Seattle / Tacoma International Airport (SEA)

  • 80% of flights departing from Seattle / Tacoma International Airport touch down at their destination according to schedule. With its solid on-time performance, disruptions are unlikely when taking off from SEA.

  • Central Seattle to Seattle / Tacoma International Airport is approximately 23 kilometres. Depending on traffic, it'll take about 25 minutes to get there if you're ride-sharing, catching a taxi or driving.

  • Taking public transport? Expect a journey time of around 35 minutes.

  • Booked an early flight from Seattle / Tacoma International Airport to Sofia Airport? Avoid rushing to the terminal (and get some extra shut-eye) by picking one of these hotels near SEA:

Arriving at Sofia Airport (SOF)

When to fly to Sofia Airport (SOF)

  • It's time to plan your trip dates for your flight from Seattle / Tacoma International Airport to Sofia Airport. August is the most popular month to visit Sofia. If you want a quieter vibe, go in March.

  • Lock in your flight from Seattle / Tacoma International Airport to Sofia Airport for August if you'd like to visit Sofia during its warmest month. You can expect temperatures of between 13ºC (55ºF) and 32ºC (90ºF).

  • If you'd rather travel in cooler conditions, look for a cheap ticket from SEA to SOF in January. Average temperatures are between -11ºC (12ºF) and 7ºC (45ºF) then.

Explore more of Bulgaria

  • You've visited Sofia, now it's time to discover other corners of Bulgaria. Journey around 129 kilometres south-east to Plovdiv to tick off its top attractions. From Plovdiv Roman Theatre to Municipal Institute "Ancient Plovdiv" and Museum Centre for Contemporary History, there's plenty to keep you busy.

  • If you're eager to discover another major destination in Bulgaria, consider Varna, about 386 kilometres east of Sofia. Sahara beach, Museum of Natural History and Sea Garden are the start of reasons to visit.

Plan the rest of your trip from Seattle to Sofia

Prices shown on this page are estimated lowest prices only. Found in the last 12 days.