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Sofia

$399+ Cheap flights from Portland (PDX) 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.
PDX — SOF
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheap flight deals from Portland to Sofia

Best flights from Portland to Sofia
Discover carefully curated flight deals from Portland to Sofia that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated December 12, 2025.

This Air France deal was found by Cheapflights users on 12/11. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/26:50 amPDX - SOF
2 stops21h 15mMultiple Airlines
Fri 2/137:00 amSOF - PDX
1 stop14h 25mMultiple Airlines
Deal found 12/11$532
This Lufthansa deal was found by Cheapflights users on 12/11. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/23:50 pmPDX - SOF
2 stops20h 55mLufthansa
Wed 2/116:10 amSOF - PDX
2 stops22h 20mLufthansa
Deal found 12/11$535
This United Airlines deal was found by Cheapflights users on 12/11. 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.
Fri 1/307:00 amPDX - SOF
2 stops25h 20mUnited Airlines
Sun 2/156:10 amSOF - PDX
2 stops28h 24mUnited Airlines
Deal found 12/11$539
This United Airlines deal was found by Cheapflights users on 12/11. 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.
Sat 1/311:24 pmPDX - SOF
3 stops23h 21mUnited Airlines
Mon 2/96:10 amSOF - PDX
2 stops42h 45mUnited Airlines
Deal found 12/11$539
This United Airlines deal was found by Cheapflights users on 12/11. 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 2/51:24 pmPDX - SOF
3 stops23h 21mUnited Airlines
Sun 2/156:10 amSOF - PDX
2 stops26h 30mUnited Airlines
Deal found 12/11$539
This United Airlines deal was found by Cheapflights users on 12/11. 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.
Wed 2/41:24 pmPDX - SOF
3 stops23h 21mUnited Airlines
Sun 2/156:10 amSOF - PDX
2 stops26h 30mUnited Airlines
Deal found 12/11$539
This United Airlines deal was found by Cheapflights users on 12/11. 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.
Mon 2/21:24 pmPDX - SOF
3 stops37h 51mUnited Airlines
Wed 2/116:10 amSOF - PDX
2 stops37h 32mUnited Airlines
Deal found 12/11$539
This United Airlines deal was found by Cheapflights users on 12/11. 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.
Wed 2/41:24 pmPDX - SOF
3 stops23h 21mUnited Airlines
Wed 2/116:10 amSOF - PDX
2 stops37h 32mUnited Airlines
Deal found 12/11$539
This United Airlines deal was found by Cheapflights users on 12/11. 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.
Mon 2/21:24 pmPDX - SOF
3 stops37h 51mUnited Airlines
Mon 2/92:20 pmSOF - PDX
2 stops34h 35mUnited Airlines
Deal found 12/11$539
This United Airlines deal was found by Cheapflights users on 12/11. 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 2/51:24 pmPDX - SOF
3 stops23h 21mUnited Airlines
Thu 2/126:00 amSOF - PDX
2 stops26h 59mUnited Airlines
Deal found 12/11$539
This United Airlines deal was found by Cheapflights users on 12/11. 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.
Sun 2/13:45 pmPDX - SOF
2 stops45h 00mUnited Airlines
Sun 2/156:10 amSOF - PDX
2 stops28h 24mUnited Airlines
Deal found 12/11$539
This United Airlines deal was found by Cheapflights users on 12/11. 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.
Mon 2/21:24 pmPDX - SOF
3 stops37h 51mUnited Airlines
Thu 2/126:00 amSOF - PDX
2 stops26h 59mUnited Airlines
Deal found 12/11$539

Find flight deals from Portland to Sofia

Discover tips and strategies to find the most affordable flight options for your journey from Portland (PDX) to Sofia (SOF). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$485
(Ticket)

One-way from

$399
(Kiwi.com)

Popular in

May

Cheapest in

February

Average price

$783
Provider with most accurate pricing for Portland-Sofia flight deals.
Search Deals
Provider most trusted by Cheapflights users for Portland-Sofia flights.
Search Deals
From Portland to Sofia
Search Deals
One-way flight from Portland to Sofia
Search Deals
Highest demand for flights based on searches. 23% potential increase in price ($290 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($42 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 Portland 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 12, 2025.
Use the filters below to find and compare flights from Portland to Sofia that are best for you.

Fly from

Portland

Fly to

Sofia

Route

Depart

Return

Price

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 2/2

6:50 am-2:05 pm

2 stops21h 15m

Sofia

Fri 2/13

7:00 am-11:25 am

1 stop14h 25m

$532

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 2/2

3:50 pm-10:45 pm

2 stops20h 55m

Sofia

Wed 2/11

6:10 am-6:30 pm

2 stops22h 20m

$535

PortlandSofia

PDX - SOF

PDXSOF

Portland

Fri 1/30

7:00 am-6:20 pm

2 stops25h 20m

Sofia

Sun 2/15

6:10 am-12:34 am

2 stops28h 24m

$539

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sat 1/31

1:24 pm-10:45 pm

3 stops23h 21m

Sofia

Mon 2/9

6:10 am-2:55 pm

2 stops42h 45m

$539

PortlandSofia

PDX - SOF

PDXSOF

Portland

Thu 2/5

1:24 pm-10:45 pm

3 stops23h 21m

Sofia

Sun 2/15

6:10 am-10:40 pm

2 stops26h 30m

$539

PortlandSofia

PDX - SOF

PDXSOF

Portland

Wed 2/4

1:24 pm-10:45 pm

3 stops23h 21m

Sofia

Sun 2/15

6:10 am-10:40 pm

2 stops26h 30m

$539

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 2/2

1:24 pm-1:15 pm

3 stops37h 51m

Sofia

Wed 2/11

6:10 am-9:42 am

2 stops37h 32m

$539

PortlandSofia

PDX - SOF

PDXSOF

Portland

Wed 2/4

1:24 pm-10:45 pm

3 stops23h 21m

Sofia

Wed 2/11

6:10 am-9:42 am

2 stops37h 32m

$539

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 2/2

1:24 pm-1:15 pm

3 stops37h 51m

Sofia

Mon 2/9

2:20 pm-2:55 pm

2 stops34h 35m

$539

PortlandSofia

PDX - SOF

PDXSOF

Portland

Thu 2/5

1:24 pm-10:45 pm

3 stops23h 21m

Sofia

Thu 2/12

6:00 am-10:59 pm

2 stops26h 59m

$539

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/11

Showing 1-10 of 22 results
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Compare providers for flights from Portland to Sofia

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Portland to Sofia in December.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Portland-Sofia flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Portland-Sofia flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Portland-Sofia flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Portland-Sofia flights, Cheapflights users trust eDreams the most. eDreams has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Portland-Sofia flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Portland to Sofia

Have a flexible travel schedule? Discover the best time to fly to Sofia from Portland 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 Portland to Sofia

What is the cheapest month to book a flight from Portland to Sofia?

Currently, September is the cheapest month in which you can book a flight from Portland to Sofia (average of $638). Flying from Portland to Sofia in May is currently the most expensive (average of $1,169). 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 PDX to SOF?

Find hourly flight availability from Portland 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 12, 2025.

A simple way to save on the total cost of your ticket is to fly from Portland to Sofia at noon. If you’re flexible enough to do this you can expect to save up to 13% on your trip compared to booking a flight in the morning.

Reviews of airlines servicing Sofia

Get insights into the airlines that provide service to Sofia. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Sofia. Reviews last updated December 12, 2025.
Read reviews from past customers who have flown KLM, United Airlines, and Lufthansa from Portland to Sofia. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
KLM
7.7
Good
1,432 reviews

Food

7.2

Boarding

7.8

Comfort

7.6

Overall

7.7

Entertainment

7.1

Crew

8.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
KLM
7.7
Good
1,432 reviews
KLM
7.7
Good
1,432 reviews

Food

7.2

Boarding

7.8

Comfort

7.6

Overall

7.7

Entertainment

7.1

Crew

8.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
United Airlines
7.4
Good
9,093 reviews
KLM
7.7
Good
1,432 reviews

Food

7.2

Boarding

7.8

Comfort

7.6

Overall

7.7

Entertainment

7.1

Crew

8.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Lufthansa
6.8
Okay
7,626 reviews
KLM
7.7
Good
1,432 reviews

Food

7.2

Boarding

7.8

Comfort

7.6

Overall

7.7

Entertainment

7.1

Crew

8.3

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle

Related info for your journey

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

  • How long is the flight from Portland to Sofia?

    Lufthansa and United Airlines can get you from Portland to Sofia in just under 20h 55m. Your travel time can differ by up to 4h 25m. Airlines will cover a distance of 5985 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Portland to Sofia round-trip?

    Cheapflights users have booked flights from Portland to Sofia round-trip from $635. Other airlines that can offer you cheap pricing are United Airlines, from $639, and KLM, from $692. Lufthansa is priced at 34% lower than the current average price of a flight leaving 3 months from now.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Portland 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 Portland to Sofia?

    Currently, September is the cheapest month in which you can book a flight from Portland to Sofia (average of $638). Flying from Portland to Sofia in May is currently the most expensive (average of $1,169). 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

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Portland to Sofia

See prices for flight routes from nearby airports that may be better suited for you.
Boise to Sofia flights

Top 3 airlines flying from Portland to Sofia

Discover the top 3 airlines that operate flights from Portland 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 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
LufthansaCheapest$635Average$961FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$639Average$896FlexibilityNo cancel feeOn-time69%
KLMCheapest$692Average$949FlexibilityNo cancel feeOn-time75%

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