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Sofia

$404+ Cheap flights from Washington to Sofia (SOF)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/15. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — SOF
Jan 2 — Jan 91
Fri 1/2
Fri 1/9
1 adult, Economy
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Cheap flight deals from Washington to Sofia

Cheapest flights from Washington to Sofia
Explore the most affordable flight options available from Washington to Sofia. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 3, 2025.

This United Airlines deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/231:55 pmSEA - SOF
2 stops37h 55mUnited Airlines
Mon 1/121:45 pmSOF - SEA
2 stops41h 12mUnited Airlines
Deal found 12/2$842
This United Airlines deal was found by Cheapflights users on 12/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/168:10 amSEA - SOF
2 stops28h 35mUnited Airlines
Mon 1/121:45 pmSOF - SEA
2 stops41h 12mUnited Airlines
Deal found 12/1$1,039
This Expedia deal was found by Cheapflights users on 12/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/410:00 amSEA - SOF
2 stops21h 50mMultiple Airlines
Thu 12/112:35 pmSOF - SEA
2 stops40h 16mMultiple Airlines
Deal found 12/3$1,096
This Kiwi.com deal was found by Cheapflights users on 12/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/53:10 pmSEA - SOF
2 stops24h 20mMultiple Airlines
Mon 12/810:40 amSOF - SEA
1 stop15h 00mMultiple Airlines
Deal found 12/3$1,120
This Mytrip deal was found by Cheapflights users on 11/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/15:40 pmSEA - SOF
3 stops35h 50mMultiple Airlines
Mon 12/810:40 amSOF - SEA
1 stop15h 00mMultiple Airlines
Deal found 11/30$1,131
This United Airlines deal was found by Cheapflights users on 12/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/305:00 amPDX - SOF
2 stops22h 45mUnited Airlines
Tue 1/66:00 amSOF - PDX
2 stops39h 57mUnited Airlines
Deal found 12/2$1,147
This Kiwi.com deal was found by Cheapflights users on 12/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/610:00 amSEA - SOF
2 stops23h 10mMultiple Airlines
Mon 12/810:40 amSOF - SEA
1 stop15h 00mMultiple Airlines
Deal found 12/3$1,163
This Mytrip deal was found by Cheapflights users on 12/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/189:50 amPDX - SOF
3 stops31h 05mMultiple Airlines
Sat 12/276:35 pmSOF - PDX
2 stops32h 25mMultiple Airlines
Deal found 12/3$2,306
This United Airlines deal was found by Cheapflights users on 12/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/187:00 amPDX - SOF
2 stops29h 45mUnited Airlines
Sat 12/272:00 pmSOF - PDX
2 stops42h 46mUnited Airlines
Deal found 12/3$2,512
This oojo deal was found by Cheapflights users on 12/3. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/182:56 pmPDX - SOF
2 stops34h 19mBritish Airways
Sat 12/2712:05 pmSOF - PDX
1 stop37h 50mBritish Airways
Deal found 12/3$3,663

Find flight deals from Washington to Sofia

Keep the following information in mind while searching for Washington to Sofia flight deals. Data was last updated December 3, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$452
(Ticket)

One-way from

$404
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$993
Provider with most accurate pricing for Seattle/Tacoma Intl-Sofia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Sofia flights.
Search Deals
From Washington to Sofia
Search Deals
One-way flight from Washington to Sofia
Search Deals
Highest demand for flights based on searches. 18% potential increase in price ($179 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($24 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Washington to Sofia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 3, 2025.
Use the filters below to find and compare flights from Washington to Sofia that are best for you.

Fly from

Washington

Fly to

Sofia

Route

Depart

Return

Price

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Mon 1/12

8:10 am-6:00 pm

2 stops23h 50m

Sofia

Mon 1/26

3:00 pm-9:12 pm

2 stops40h 12m

$452

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Fri 1/16

3:10 pm-6:20 pm

1 stop17h 10m

Sofia

Fri 1/23

6:10 am-7:16 pm

2 stops23h 06m

$484

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Fri 1/16

3:10 pm-6:20 pm

1 stop17h 10m

Sofia

Fri 1/23

6:05 am-1:20 pm

1 stop17h 15m

$488

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 4/1

2:16 pm-11:10 pm

2 stops22h 54m

Sofia

Wed 4/8

6:20 am-12:20 pm

1 stop16h 00m

$490

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Wed 4/1

2:16 pm-11:10 pm

2 stops22h 54m

Sofia

Wed 4/8

6:20 am-10:08 pm

2 stops25h 48m

$495

PortlandSofia

PDX - SOF

PDXSOF

Portland

Wed 2/4

3:55 pm-10:45 pm

2 stops20h 50m

Sofia

Thu 2/12

6:00 am-10:40 pm

2 stops26h 40m

$498

SeattleSofia

SEA - SOF

SEASOF

Seattle/Tacoma Intl

Tue 3/24

12:55 pm-10:45 pm

2 stops24h 50m

Sofia

Tue 4/28

6:10 am-12:20 pm

1 stop16h 10m

$499

SpokaneSofia

GEG - SOF

GEGSOF

Spokane

Wed 3/11

1:43 pm-6:20 pm

2 stops19h 37m

Sofia

Wed 3/25

6:05 am-9:03 pm

2 stops23h 58m

$502

PortlandSofia

PDX - SOF

PDXSOF

Portland

Wed 2/4

1:25 pm-2:05 pm

1 stop14h 40m

Sofia

Wed 2/11

7:00 am-11:25 am

1 stop14h 25m

$504

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 2/2

8:30 am-10:45 pm

2 stops28h 15m

Sofia

Wed 2/11

6:10 am-6:30 pm

2 stops22h 20m

$504

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/1

Showing 1-10 of 30 results
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Best time to book a flight from Washington to Sofia

Have a flexible travel schedule? Discover the best time to fly to Sofia from Washington with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington to Sofia

What is the cheapest month to book a flight from State of Washington to Sofia?

Currently, November is the cheapest month in which you can book a flight from State of Washington to Sofia (average of $537). Flying from State of Washington to Sofia in June is currently the most expensive (average of $943). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from WA to SOF?

Find hourly flight availability from Washington to Sofia. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated December 3, 2025.

It’s optimal to fly from State of Washington to Sofia in the afternoon. By choosing this option you can save up to 18% on the cost of your flight, compared to a flight in the evening.

What is the cheapest day to fly from State of Washington to Sofia?

Use this chart to determine the cheapest time to fly round-trip from Washington to Sofia. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their State of Washington to Sofia flight should consider departing on Sunday afternoons when fares are most often at their lowest. Tuesday evenings flights should be avoided if possible as fares are typically the most expensive at this time.

Related info for your journey

Find useful and relevant information for your journey from Washington to Sofia. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Sofia from Washington?

    Located just 4.2 mi from the city center, Sofia (SOF) is the airport most travelers will use when flying to Sofia from Washington.

  • How long is the flight from State of Washington to Sofia?

    There are many flights that can get you from State of Washington to Sofia in 14h 40m. Fly via Lufthansa, KLM, or United Airlines to get the fastest option. There are 5985 mi between State of Washington and Sofia. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the most popular routes from State of Washington to Sofia?

    When deciding which route to take from State of Washington to Sofia consider Seattle/Tacoma Intl - Sofia, Portland - Sofia or Spokane - Sofia as they are the most popular.

  • Can I find deals for flights from Washington to Sofia that include hotel bookings?

    Yes. In addition to deals on Washington to Sofia flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to Sofia?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Sofia.

  • Can I find deals for business class flights from Washington to Sofia?

    Yes. Cheapflights offers flight deals from Washington to Sofia by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from State of Washington to Sofia?

    Currently, November is the cheapest month in which you can book a flight from State of Washington to Sofia (average of $537). Flying from State of Washington to Sofia in June is currently the most expensive (average of $943). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Washington to Sofia

See prices for flight routes from nearby airports that may be better suited for you.
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Top 5 airlines flying from Washington to Sofia

Discover the top 5 airlines that operate flights from Washington to Sofia. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated December 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$541Average$853FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$555Average$718FlexibilityNo cancel feeOn-time77%
Turkish AirlinesCheapest$587Average$837FlexibilityNo cancel feeOn-time77%
KLMCheapest$625Average$972FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$676Average$885FlexibilityNo cancel feeOn-time69%

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