Which layover airport offers the lowest fares from Seattle to Sofia?

Flights via Amsterdam (AMS) offer the lowest average round-trip price of $696.

What is the cheapest airline that flies from Seattle/Tacoma Intl to Sofia?

Lufthansa, British Airways, and United Airlines are the most popular carriers operating from Seattle/Tacoma Intl to Sofia

What airlines fly to Sofia?

Lufthansa, Turkish Airlines and KLM are the top three most popular airlines that fly to Sofia from Seattle according to our data. Lufthansa is the first choice among our users, with 46% of people opting to fly with this airline when traveling to Sofia. Keep in mind that there are 4 different airlines that fly to Sofia on a routine basis, so you have a few additional options to choose from.

Which airport is the most popular layover for flights between Seattle and Sofia?

Istanbul (IST) was the most common stop: 55% of momondo users choosing 1-stop flights on this route connected there.

Which layover airport has the shortest travel time from Seattle to Sofia?

Flights connecting via Amsterdam (AMS) have the shortest average one-way travel time: 14h 10m.

Which layover airport has the shortest connection time from Seattle to Sofia?

Amsterdam (AMS) has the shortest average layover time for this route: 1h 28m.

When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Sofia Airport?

Prices for flights from Seattle/Tacoma Intl Airport to Sofia Airport are updated daily.

How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Sofia Airport?

The number of operators available for flights from Seattle/Tacoma Intl Airport to Sofia Airport is 4 as of September 2026.

How old do you have to be to fly from Seattle/Tacoma Intl Airport to Sofia Airport?

The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Sofia Airport.

What documentation or ID do you need to fly to Sofia Airport?

The travel and health documents you'll need for your trip to Sofia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Sofia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

$454 Cheap Flights from Seattle to Sofia in 2026/27

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Seattle to Sofia

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

10:31 am - 8:10 pmSEA Seattle/Tacoma Intl-SOF Sofia

23h 39m2 stops Chicago O'Hare Intl London Heathrow

5:15 pm - 4:50 pmSOF Sofia-SEA Seattle/Tacoma Intl

33h 35m1 stop London Heathrow

$612British Airways

Tue, Feb 16 - Mon, Mar 1

6:45 pm - 8:10 pmSEA Seattle/Tacoma Intl-SOF Sofia

15h 25m1 stop London Heathrow

5:15 pm - 4:50 pmSOF Sofia-SEA Seattle/Tacoma Intl

33h 35m1 stop London Heathrow

$613British Airways

Tue, Feb 16 - Mon, Mar 1

10:31 am - 8:10 pmSEA Seattle/Tacoma Intl-SOF Sofia

23h 39m2 stops Chicago O'Hare Intl London Heathrow

5:15 pm - 8:15 pmSOF Sofia-SEA Seattle/Tacoma Intl

37h 00m2 stops London Heathrow Chicago O'Hare Intl

$616British Airways

Tue, Feb 16 - Mon, Mar 1

3:50 pm - 10:55 pmSEA Seattle/Tacoma Intl-SOF Sofia

22h 05m1 stop Munich Franz Josef Strauss

7:05 pm - 1:00 pmSOF Sofia-SEA Seattle/Tacoma Intl

27h 55m1 stop Munich Franz Josef Strauss

$627Lufthansa

Sun, Oct 25 - Tue, Nov 10

6:50 pm - 11:15 pmSEA Seattle/Tacoma Intl-SOF Sofia

18h 25m1 stop Munich Franz Josef Strauss

6:00 am - 2:00 pmSOF Sofia-SEA Seattle/Tacoma Intl

17h 00m1 stop Munich Franz Josef Strauss

$633Lufthansa

Wed, Oct 21 - Wed, Oct 28

12:46 pm - 10:55 pmSEA Seattle/Tacoma Intl-SOF Sofia

24h 09m2 stops Denver Intl Munich Franz Josef Strauss

7:55 am - 12:14 amSOF Sofia-SEA Seattle/Tacoma Intl

26h 19m2 stops Vienna Intl Chicago O'Hare Intl

$646United Airlines

Tue, Mar 2 - Fri, Mar 12

8:00 am - 11:50 amSEA Seattle/Tacoma Intl-SOF Sofia

17h 50m2 stops Washington, D.C. Dulles Intl Vienna Intl

7:55 am - 9:05 pmSOF Sofia-SEA Seattle/Tacoma Intl

23h 10m2 stops Vienna Intl Newark

$650United Airlines

Mon, Mar 1 - Fri, Mar 12

2:50 pm - 6:20 pmSEA Seattle/Tacoma Intl-SOF Sofia

17h 30m1 stop Munich Franz Josef Strauss

7:05 pm - 1:00 pmSOF Sofia-SEA Seattle/Tacoma Intl

27h 55m1 stop Munich Franz Josef Strauss

$674Lufthansa

Sun, Nov 15 - Sat, Nov 21

7:15 pm - 3:00 pmSEA Seattle/Tacoma Intl-SOF Sofia

33h 45m1 stop Istanbul

4:00 pm - 6:10 pmSOF Sofia-SEA Seattle/Tacoma Intl

36h 10m1 stop Istanbul

$679Turkish Airlines

Sun, Oct 18 - Tue, Nov 3

7:05 pm - 3:10 pmSEA Seattle/Tacoma Intl-SOF Sofia

34h 05m1 stop Istanbul

9:30 am - 6:10 pmSOF Sofia-SEA Seattle/Tacoma Intl

17h 40m1 stop Istanbul

$717Turkish Airlines

Tue, Mar 2 - Mon, Mar 15

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Lufthansa flights from Seattle to Sofia

Our best Lufthansa deals on Seattle to Sofia flight tickets

Lufthansa

Oct 25

SEA3:50 pmSeattle/Tacoma Intl

22h 05m

1 stop

SOF10:55 pmSofia

Nov 10

SOF7:05 pmSofia

27h 55m

1 stop

SEA1:00 pmSeattle/Tacoma Intl

$627

Lufthansa

Oct 21

SEA6:50 pmSeattle/Tacoma Intl

18h 25m

1 stop

SOF11:15 pmSofia

Oct 28

SOF6:00 amSofia

17h 00m

1 stop

SEA2:00 pmSeattle/Tacoma Intl

$633

Lufthansa

Nov 15

SEA2:50 pmSeattle/Tacoma Intl

17h 30m

1 stop

SOF6:20 pmSofia

Nov 21

SOF7:05 pmSofia

27h 55m

1 stop

SEA1:00 pmSeattle/Tacoma Intl

$674

British Airways flights from Seattle to Sofia

Our best British Airways deals on Seattle to Sofia flight tickets

British Airways

Feb 16

SEA10:31 amSeattle/Tacoma Intl

23h 39m

2 stops

SOF8:10 pmSofia

Mar 1

SOF5:15 pmSofia

33h 35m

1 stop

SEA4:50 pmSeattle/Tacoma Intl

$612

British Airways

Feb 16

SEA6:45 pmSeattle/Tacoma Intl

15h 25m

1 stop

SOF8:10 pmSofia

Mar 1

SOF5:15 pmSofia

33h 35m

1 stop

SEA4:50 pmSeattle/Tacoma Intl

$613

British Airways

Feb 16

SEA10:31 amSeattle/Tacoma Intl

23h 39m

2 stops

SOF8:10 pmSofia

Mar 1

SOF5:15 pmSofia

37h 00m

2 stops

SEA8:15 pmSeattle/Tacoma Intl

$616

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleSofia

SEA Seattle/Tacoma Intl - SOF Sofia

SEASOF

Seattle/Tacoma Intl

Tue 2/16

10:31 am-8:10 pm

2 stops23h 39m

Sofia

Mon 3/1

5:15 pm-4:50 pm

1 stop33h 35m

$612

SeattleSofia

SEA Seattle/Tacoma Intl - SOF Sofia

SEASOF

Seattle/Tacoma Intl

Tue 2/16

6:45 pm-8:10 pm

1 stop15h 25m

Sofia

Mon 3/1

5:15 pm-4:50 pm

1 stop33h 35m

$613

SeattleSofia

SEA Seattle/Tacoma Intl - SOF Sofia

SEASOF

Seattle/Tacoma Intl

Tue 2/16

10:31 am-8:10 pm

2 stops23h 39m

Sofia

Mon 3/1

5:15 pm-8:15 pm

2 stops37h 00m

$616

SeattleSofia

SEA Seattle/Tacoma Intl - SOF Sofia

SEASOF

Seattle/Tacoma Intl

Sun 10/25

3:50 pm-10:55 pm

1 stop22h 05m

Sofia

Tue 11/10

7:05 pm-1:00 pm

1 stop27h 55m

$627

Quickest round-trip

SeattleSofia

SEA Seattle/Tacoma Intl - SOF Sofia

SEASOF

Seattle/Tacoma Intl

Wed 10/21

6:50 pm-11:15 pm

1 stop18h 25m

Sofia

Wed 10/28

6:00 am-2:00 pm

1 stop17h 00m

$633

SeattleSofia

SEA Seattle/Tacoma Intl - SOF Sofia

SEASOF

Seattle/Tacoma Intl

Tue 3/2

12:46 pm-10:55 pm

2 stops24h 09m

Sofia

Fri 3/12

7:55 am-12:14 am

2 stops26h 19m

$646

SeattleSofia

SEA Seattle/Tacoma Intl - SOF Sofia

SEASOF

Seattle/Tacoma Intl

Mon 3/1

8:00 am-11:50 am

2 stops17h 50m

Sofia

Fri 3/12

7:55 am-9:05 pm

2 stops23h 10m

$650

SeattleSofia

SEA Seattle/Tacoma Intl - SOF Sofia

SEASOF

Seattle/Tacoma Intl

Sun 11/15

2:50 pm-6:20 pm

1 stop17h 30m

Sofia

Sat 11/21

7:05 pm-1:00 pm

1 stop27h 55m

$674

SeattleSofia

SEA Seattle/Tacoma Intl - SOF Sofia

SEASOF

Seattle/Tacoma Intl

Sun 10/18

7:15 pm-3:00 pm

1 stop33h 45m

Sofia

Tue 11/3

4:00 pm-6:10 pm

1 stop36h 10m

$679

SeattleSofia

SEA Seattle/Tacoma Intl - SOF Sofia

SEASOF

Seattle/Tacoma Intl

Tue 3/2

7:05 pm-3:10 pm

1 stop34h 05m

Sofia

Mon 3/15

9:30 am-6:10 pm

1 stop17h 40m

$717

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 16 resultsSorted by cheapest first

How to get the cheapest flight ticket from Seattle to Sofia

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

Layovers

What is the typical price of a round-trip flight between Seattle and Sofia?

Prices are currently typical for flights on this route.

Typical prices usually range from $611 to $865.
The lowest price recently found on this route was $612.

What is the cheapest month to fly to Sofia?

The cheapest month to fly to Sofia from Seattle is in October. Flight prices, which tend to average around $605, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of October, then book flights to Sofia from Seattle during January instead. Flights to Sofia in January, while not as cheap as those in October, still average around $615.

How far in advance should I book a flight from Seattle to Sofia?

You are more likely to see cheaper flights to Sofia from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Sofia for around $770 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Sofia from Seattle for as low as $673 on momondo.

When to book flights from Seattle to Sofia

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Sofia according to our flight data. Find out which month and days have the cheapest flights.

Estimated round-trip price

Cheap Seattle to Sofia (SEA to SOF) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Sofia

Best Price Found	$454
Fastest flight time	16h 21m
Direct flights	None

The best one-way flight to Sofia from Seattle in the past 72 hours is $454. The best round-trip flight deal from Seattle to Sofia found on momondo in the last 72 hours is $612.

The fastest flight from Seattle to Sofia takes 16h 21m

There are no direct flights from Seattle to Sofia. There are no popular flight routes from Seattle to Sofia.

Search flight deals

Frequently asked questions about flying from Seattle to Sofia

How far is Seattle/Tacoma Intl to Sofia by plane?
There are 5850.6 mi between Seattle/Tacoma Intl and Sofia. Flights usually cover this in 16h 21m, depending on flying conditions and air traffic around both airports.
When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Sofia Airport?
Prices for flights from Seattle/Tacoma Intl Airport to Sofia Airport are updated daily.
How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Sofia Airport?
The number of operators available for flights from Seattle/Tacoma Intl Airport to Sofia Airport is 4 as of September 2026.
How old do you have to be to fly from Seattle/Tacoma Intl Airport to Sofia Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Sofia Airport.
What documentation or ID do you need to fly to Sofia Airport?
The travel and health documents you'll need for your trip to Sofia Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Sofia Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Seattle to Sofia?
Based on momondo bookings for flights between Seattle and Sofia, the leading airline is Lufthansa, making up 46% of the total bookings. Other popular airlines include Turkish Airlines with 32%, KLM with 17%, and United Airlines with 5%.

Best airlines flying from Seattle to Sofia

Compare and see reviews for airlines that fly from Seattle to Sofia with momondo

Airline	Rating	Free Cancellation	Price
KLM	PriceFrom $538	Free Cancellation	Rating 7.8 1,576 reviews	Search KLM flights
Lufthansa	PriceFrom $540	Free Cancellation	Rating 6.8 8,234 reviews	Search Lufthansa flights
United Airlines	PriceFrom $545	Free Cancellation	Rating 7.4 10,233 reviews	Search United Airlines flights
Turkish Airlines	PriceFrom $580	Free Cancellation	Rating 7.4 4,461 reviews	Search Turkish Airlines flights

Bansko

Borovets

Velingrad

Sandanski

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Sofia?

It is quick and easy to find Seattle to Sofia flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Sofia that suits you.

Can I find flights from Seattle to Sofia with flexible booking policies on momondo?

All flight searches from Seattle to Sofia on momondo can be filtered to show those which offer flexible booking policies.

How can momondo help me find flights from Seattle to Sofia?

Once all potential Seattle to Sofia flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Seattle to Sofia right now. Can momondo alert me if prices change?

Yes momondo offers price alerts on flights to Sofia from Seattle. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Sofia trip

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Cheap flights from Seattle to Sofia from $454

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Sofia departing on 11/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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Lufthansa flights from Seattle to Sofia

Our best Lufthansa deals on Seattle to Sofia flight tickets

British Airways flights from Seattle to Sofia

Our best British Airways deals on Seattle to Sofia flight tickets

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How to get the cheapest flight ticket from Seattle to Sofia

What is the typical price of a round-trip flight between Seattle and Sofia?

What is the cheapest month to fly to Sofia?

How far in advance should I book a flight from Seattle to Sofia?

What is the cheapest airline that flies from Seattle/Tacoma Intl to Sofia?

What airlines fly to Sofia?

Which airport is the most popular layover for flights between Seattle and Sofia?

Which layover airport offers the lowest fares from Seattle to Sofia?

Which layover airport has the shortest travel time from Seattle to Sofia?

Which layover airport has the shortest connection time from Seattle to Sofia?

When to book flights from Seattle to Sofia

Cheap Seattle to Sofia (SEA to SOF) flight deals and tips

Best Price Found

Fastest flight time

Direct flights

Frequently asked questions about flying from Seattle to Sofia

Best airlines flying from Seattle to Sofia

Compare and see reviews for airlines that fly from Seattle to Sofia with momondo

Traveling to a place near Sofia?

Why use momondo?

An easier way to manage your Sofia trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

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List of cabin classes available on flights landing in Sofia. Availability may vary depending on flight origin and airline.

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