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

Air France is the most popular carrier operating from Seattle/Tacoma Intl to Sofia

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.

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

Istanbul (IST) was the most common stop: 78% 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 Frankfurt am Main (FRA) have the shortest average one-way travel time: 13h 42m.

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

Flights via Frankfurt am Main (FRA) offer the lowest average round-trip price of $672.

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 41% 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.

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 April 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.

$325 Cheap Flights from Seattle to Sofia in 2026

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

Prices are currently low for flights on this route. Typical prices usually range from $802 to $617. The lowest price recently found on this route was $621.

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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.

7:10 pm - 8:15 pm

SEA

SOF

15h 05m

1 stop

3:50 pm - 5:15 pm

SOF

SEA

35h 25m

1 stop

$621Turkish Airlines

Sun, Sep 6 - Tue, Sep 22

7:10 pm - 1:15 pm

SEA

SOF

32h 05m

1 stop

9:35 am - 5:15 pm

SOF

SEA

17h 40m

1 stop

$636Turkish Airlines

Wed, Sep 9 - Wed, Sep 16

7:10 pm - 8:45 am

SEA

SOF

27h 35m

1 stop

9:35 am - 10:40 am

SOF

SEA

35h 05m

1 stop

$654Turkish Airlines

Fri, Aug 7 - Fri, Sep 4

7:10 pm - 8:45 am

SEA

SOF

27h 35m

1 stop

9:05 pm - 5:15 pm

SOF

SEA

30h 10m

1 stop

$661Turkish Airlines

Fri, Aug 14 - Fri, Sep 11

12:35 pm - 3:00 pm

SEA

SOF

16h 25m

1 stop

2:05 pm - 5:15 pm

SOF

SEA

37h 10m

1 stop

$677Turkish Airlines

Thu, Aug 27 - Sun, Sep 13

7:10 pm - 8:45 am

SEA

SOF

27h 35m

1 stop

3:50 pm - 5:15 pm

SOF

SEA

35h 25m

1 stop

$679Turkish Airlines

Sun, Sep 6 - Sat, Sep 19

7:10 pm - 8:15 pm

SEA

SOF

15h 05m

1 stop

9:35 am - 5:15 pm

SOF

SEA

17h 40m

1 stop

$713Turkish Airlines

Wed, Sep 9 - Wed, Sep 23

7:10 pm - 3:00 pm

SEA

SOF

33h 50m

1 stop

3:50 pm - 5:15 pm

SOF

SEA

35h 25m

1 stop

$714Turkish Airlines

Sun, Sep 6 - Tue, Sep 22

7:10 pm - 8:15 pm

SEA

SOF

15h 05m

1 stop

9:35 am - 5:15 pm

SOF

SEA

17h 40m

1 stop

$716Turkish Airlines

Sun, Sep 13 - Wed, Sep 23

7:10 pm - 8:45 am

SEA

SOF

27h 35m

1 stop

3:50 pm - 5:15 pm

SOF

SEA

35h 25m

1 stop

$737Turkish Airlines

Thu, Oct 15 - Mon, Oct 19

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United Airlines flights from Seattle to Sofia

Our best United Airlines deals on Seattle to Sofia flight tickets

United Airlines

Sep 9

SEA7:30 amSeattle/Tacoma Intl

18h 40m

2 stops

SOF12:10 pmSofia

Sep 16

SOF6:10 amSofia

20h 49m

1 stop

SEA4:59 pmSeattle/Tacoma Intl

$769

United Airlines

Sep 6

SEA3:51 pmSeattle/Tacoma Intl

21h 24m

2 stops

SOF11:15 pmSofia

Sep 22

SOF6:10 amSofia

15h 45m

1 stop

SEA11:55 amSeattle/Tacoma Intl

$771

United Airlines

Aug 15

SEA11:56 pmSeattle/Tacoma Intl

32h 44m

2 stops

SOF6:40 pmSofia

Sep 1

SOF6:10 amSofia

22h 05m

2 stops

SEA6:15 pmSeattle/Tacoma Intl

$781

Air Canada flights from Seattle to Sofia

Our best Air Canada deals on Seattle to Sofia flight tickets

Air Canada

Sep 9

SEA8:00 amSeattle/Tacoma Intl

18h 10m

2 stops

SOF12:10 pmSofia

Sep 16

SOF6:20 amSofia

26h 22m

2 stops

SEA10:42 pmSeattle/Tacoma Intl

$777

Air Canada

Sep 6

SEA8:00 amSeattle/Tacoma Intl

24h 10m

2 stops

SOF6:10 pmSofia

Sep 22

SOF6:10 amSofia

22h 22m

2 stops

SEA6:32 pmSeattle/Tacoma Intl

$787

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sun 9/6

7:10 pm-8:15 pm

1 stop15h 05m

Sofia

Tue 9/22

3:50 pm-5:15 pm

1 stop35h 25m

$621

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 9/9

7:10 pm-1:15 pm

1 stop32h 05m

Sofia

Wed 9/16

9:35 am-5:15 pm

1 stop17h 40m

$636

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Fri 8/7

7:10 pm-8:45 am

1 stop27h 35m

Sofia

Fri 9/4

9:35 am-10:40 am

1 stop35h 05m

$654

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Fri 8/14

7:10 pm-8:45 am

1 stop27h 35m

Sofia

Fri 9/11

9:05 pm-5:15 pm

1 stop30h 10m

$661

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Thu 8/27

12:35 pm-3:00 pm

1 stop16h 25m

Sofia

Sun 9/13

2:05 pm-5:15 pm

1 stop37h 10m

$677

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sun 9/6

7:10 pm-8:45 am

1 stop27h 35m

Sofia

Sat 9/19

3:50 pm-5:15 pm

1 stop35h 25m

$679

Quickest round-trip

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 9/9

7:10 pm-8:15 pm

1 stop15h 05m

Sofia

Wed 9/23

9:35 am-5:15 pm

1 stop17h 40m

$713

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sun 9/6

7:10 pm-3:00 pm

1 stop33h 50m

Sofia

Tue 9/22

3:50 pm-5:15 pm

1 stop35h 25m

$714

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Sun 9/13

7:10 pm-8:15 pm

1 stop15h 05m

Sofia

Wed 9/23

9:35 am-5:15 pm

1 stop17h 40m

$716

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Thu 10/15

7:10 pm-8:45 am

1 stop27h 35m

Sofia

Mon 10/19

3:50 pm-5:15 pm

1 stop35h 25m

$737

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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?

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 $587, 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 April instead. Flights to Sofia in April, while not as cheap as those in October, still average around $612.

How far in advance should I book a flight 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 $746 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 $677 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

Fastest flight time	13h 50m
Direct flights	None

The fastest flight from Seattle to Sofia takes 13h 50m

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

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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 13h 50m, 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 April 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 41% of the total bookings. Other popular airlines include Turkish Airlines with 39%, KLM with 15%, 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 1,501 reviews	Search KLM flights
Lufthansa	PriceFrom $541	Free Cancellation	Rating 6.8 7,938 reviews	Search Lufthansa flights
Turkish Airlines	PriceFrom $580	Free Cancellation	Rating 7.4 4,321 reviews	Search Turkish Airlines flights
United Airlines	PriceFrom $620	Free Cancellation	Rating 7.4 9,614 reviews	Search United Airlines flights

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Velingrad

Sandanski

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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.

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Cheap flights from Seattle to Sofia from $325

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 5/29. 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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United Airlines flights from Seattle to Sofia

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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 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

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

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

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Why use momondo?

An easier way to manage your Sofia trip

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