What airlines fly to Sofia?

KLM, United Airlines and Lufthansa are the top three most popular airlines that fly to Sofia from Portland according to our data. KLM is the first choice among our users, with 52% 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 Portland Airport to Sofia Airport?

Prices for flights from Portland Airport to Sofia Airport are updated daily.

How many operators does momondo search for flights from Portland Airport to Sofia Airport?

As of October 2025, there are 4 operators available to choose from for flights from Portland Airport to Sofia Airport.

How old do you have to be to fly from Portland Airport to Sofia Airport?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Portland Airport to Sofia Airport.

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

The travel and health documents required for your trip to Sofia Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Sofia Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$525 Cheap Flights from Portland to Sofia in 2025/26

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Find the cheapest flights from Portland to Sofia

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Cheap round-trip flights

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3:50 pm - 10:45 pmPDX-SOF

20h 55m2 stops

6:10 am - 6:30 pmSOF-PDX

22h 20m2 stops

$525Lufthansa

Find Deal

Mon, Jan 12 - Fri, Jan 30

9:50 am - 6:20 pmPDX-SOF

22h 30m2 stops

6:10 am - 12:37 amSOF-PDX

28h 27m2 stops

$533Multiple Airlines

Find Deal

Sun, Dec 7 - Sun, Dec 14

1:24 pm - 10:45 pmPDX-SOF

23h 21m3 stops

6:10 am - 6:30 pmSOF-PDX

22h 20m2 stops

$534Multiple Airlines

Find Deal

Mon, Jan 12 - Fri, Jan 30

11:59 pm - 6:20 pmPDX-SOF

32h 21m2 stops

6:10 am - 10:52 pmSOF-PDX

26h 42m2 stops

$598United Airlines

Find Deal

Sun, Nov 23 - Wed, Dec 3

10:52 am - 6:20 pmPDX-SOF

21h 28m3 stops

2:00 pm - 10:15 pmSOF-PDX

42h 15m3 stops

$643SWISS

Find Deal

Mon, Nov 24 - Tue, Dec 2

7:38 am - 10:45 pmPDX-SOF

30h 07m2 stops

1:45 pm - 10:38 pmSOF-PDX

41h 53m2 stops

$647United Airlines

Find Deal

Thu, Mar 12 - Mon, Mar 16

1:25 pm - 2:05 pmPDX-SOF

14h 40m1 stop

7:00 am - 3:33 pmSOF-PDX

18h 33m2 stops

$695KLM

Find Deal

Mon, Nov 24 - Tue, Dec 2

1:25 pm - 2:05 pmPDX-SOF

14h 40m1 stop

7:00 am - 3:33 pmSOF-PDX

18h 33m2 stops

$720KLM

Find Deal

Sun, Dec 7 - Sun, Dec 14

7:00 pm - 1:25 pmPDX-SOF

32h 25m2 stops

6:05 am - 6:30 pmSOF-PDX

22h 25m3 stops

$768Air Canada

Find Deal

Sun, Nov 23 - Wed, Dec 3

11:59 pm - 6:20 pmPDX-SOF

32h 21m3 stops

2:35 pm - 2:40 pmSOF-PDX

34h 05m3 stops

$811Air Canada

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Mon, Jan 12 - Fri, Jan 30

United Airlines flights from Portland to Sofia

Our best United Airlines deals on Portland to Sofia flight tickets

United Airlines

Nov 23

PDX11:59 pmPortland

32h 21m

2 stops

SOF6:20 pmSofia

Dec 3

SOF6:10 amSofia

26h 42m

2 stops

PDX10:52 pmPortland

$598

Find similar

United Airlines

Mar 12

PDX7:38 amPortland

30h 07m

2 stops

SOF10:45 pmSofia

Mar 16

SOF1:45 pmSofia

41h 53m

2 stops

PDX10:38 pmPortland

$647

Find similar

United Airlines

Mar 12

PDX1:35 pmPortland

24h 10m

2 stops

SOF10:45 pmSofia

Mar 16

SOF1:45 pmSofia

56h 30m

2 stops

PDX1:15 pmPortland

$652

Find similar

Air Canada flights from Portland to Sofia

Our best Air Canada deals on Portland to Sofia flight tickets

Air Canada

Nov 23

PDX7:00 pmPortland

32h 25m

2 stops

SOF1:25 pmSofia

Dec 3

SOF6:05 amSofia

22h 25m

3 stops

PDX6:30 pmPortland

$768

Find similar

Air Canada

Jan 12

PDX11:59 pmPortland

32h 21m

3 stops

SOF6:20 pmSofia

Jan 30

SOF2:35 pmSofia

34h 05m

3 stops

PDX2:40 pmPortland

$811

Find similar

Air Canada

Nov 23

PDX9:50 amPortland

22h 10m

3 stops

SOF6:00 pmSofia

Dec 3

SOF6:05 amSofia

22h 25m

3 stops

PDX6:30 pmPortland

$876

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 1/12

3:50 pm-10:45 pm

2 stops20h 55m

Sofia

Fri 1/30

6:10 am-6:30 pm

2 stops22h 20m

$525

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sun 12/7

9:50 am-6:20 pm

2 stops22h 30m

Sofia

Sun 12/14

6:10 am-12:37 am

2 stops28h 27m

$533

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 1/12

1:24 pm-10:45 pm

3 stops23h 21m

Sofia

Fri 1/30

6:10 am-6:30 pm

2 stops22h 20m

$534

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sun 11/23

11:59 pm-6:20 pm

2 stops32h 21m

Sofia

Wed 12/3

6:10 am-10:52 pm

2 stops26h 42m

$598

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 11/24

10:52 am-6:20 pm

3 stops21h 28m

Sofia

Tue 12/2

2:00 pm-10:15 pm

3 stops42h 15m

$643

PortlandSofia

PDX - SOF

PDXSOF

Portland

Thu 3/12

7:38 am-10:45 pm

2 stops30h 07m

Sofia

Mon 3/16

1:45 pm-10:38 pm

2 stops41h 53m

$647

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 11/24

1:25 pm-2:05 pm

1 stop14h 40m

Sofia

Tue 12/2

7:00 am-3:33 pm

2 stops18h 33m

$695

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sun 12/7

1:25 pm-2:05 pm

1 stop14h 40m

Sofia

Sun 12/14

7:00 am-3:33 pm

2 stops18h 33m

$720

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sun 11/23

7:00 pm-1:25 pm

2 stops32h 25m

Sofia

Wed 12/3

6:05 am-6:30 pm

3 stops22h 25m

$768

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 1/12

11:59 pm-6:20 pm

3 stops32h 21m

Sofia

Fri 1/30

2:35 pm-2:40 pm

3 stops34h 05m

$811

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

How to get the cheapest flight ticket from Portland 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

What is the cheapest month to fly to Sofia?

The cheapest month to fly to Sofia from Portland is in November. Flight prices, which tend to average around $682, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of November, then book flights to Sofia from Portland during October instead. Flights to Sofia in October, while not as cheap as those in November, still average around $748.

What is the cheapest day to depart on your flight to Sofia?

According to our data, Tuesday is the cheapest day to fly to Sofia from Portland. The lowest ticket price found for a Tuesday departure recently was $956. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Portland to Sofia on a Saturday will generally be more expensive and average around $1,199. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Sofia?

At noon is the cheapest time of day to fly from Portland to Sofia when you can find flight prices for as low as $1,012. Flying to Sofia at noon is an ideal time because this is during off-peak travel hours. In the morning is when there is more demand to fly to Sofia, so prices are often more expensive at around $1,171 per ticket.

When to book flights from Portland to Sofia

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

Estimated round-trip price

Cheap Portland to Sofia (PDX to SOF) flight deals and tips

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

Direct flights	None

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

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How far is Portland to Sofia by plane?
A flight from Portland to Sofia will travel around 5988.5 mi. 14h 40m is a normal flight duration for this route.
When did momondo last update prices for flights from Portland Airport to Sofia Airport?
Prices for flights from Portland Airport to Sofia Airport are updated daily.
How many operators does momondo search for flights from Portland Airport to Sofia Airport?
As of October 2025, there are 4 operators available to choose from for flights from Portland Airport to Sofia Airport.
How old do you have to be to fly from Portland Airport to Sofia Airport?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Portland Airport to Sofia Airport.
What documentation or ID do you need to fly to Sofia Airport?
The travel and health documents required for your trip to Sofia Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Sofia Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
What is the most popular airline from Portland to Sofia?
Based on momondo bookings for flights between Portland and Sofia, the leading airline is KLM, making up 52% of the total bookings. Other popular airlines include United Airlines with 25%, Lufthansa with 13%, and Air Canada with 10%.

Best airlines flying from Portland to Sofia

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

Airline	Rating	Free Cancellation	Price
Lufthansa	PriceFrom $638	Free Cancellation	Rating 6.8 7,541 reviews	Search Lufthansa flights
United Airlines	PriceFrom $639	Free Cancellation	Rating 7.4 8,998 reviews	Search United Airlines flights
Air Canada	PriceFrom $678	Free Cancellation	Rating 7.1 10,381 reviews	Search Air Canada flights
KLM	PriceFrom $692	Free Cancellation	Rating 7.7 1,406 reviews	Search KLM flights

Bansko

Borovets

Velingrad

Sandanski

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

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

Yes. momondo allows you to filter the results for Portland to Sofia flights to just show those with flexible booking policies.

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

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Portland to Sofia.

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

Price alerts on flights to Sofia from Portland are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.