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 55% 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 September 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.

$351 Cheap Flights from Portland to Sofia in 2025/26

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Find the cheapest flights from Portland to Sofia

Round-trip

One-way

Cheap round-trip flights

7:40 pm - 6:20 pmPDX-SOF

37h 40m2 stops

6:00 am - 9:15 amSOF-PDX

37h 15m2 stops

$551Air Canada

Find Deal

Sat, Oct 25 - Thu, Nov 6

6:15 am - 6:20 pmPDX-SOF

27h 05m2 stops

6:10 am - 6:36 pmSOF-PDX

22h 26m2 stops

$561Multiple Airlines

Find Deal

Sun, Oct 26 - Wed, Nov 5

8:30 am - 6:20 pmPDX-SOF

24h 50m2 stops

2:35 pm - 12:26 amSOF-PDX

19h 51m2 stops

$566United Airlines

Find Deal

Mon, Oct 27 - Thu, Nov 6

11:59 pm - 1:35 pmPDX-SOF

28h 36m2 stops

6:10 am - 6:36 pmSOF-PDX

22h 26m2 stops

$570United Airlines

Find Deal

Sat, Oct 25 - Wed, Nov 5

5:15 pm - 11:45 pmPDX-SOF

44h 30m2 stops

6:45 pm - 10:33 pmSOF-PDX

37h 48m2 stops

$600Lufthansa

Find Deal

Sat, Oct 25 - Mon, Nov 3

2:25 pm - 2:05 pmPDX-SOF

14h 40m1 stop

7:00 am - 8:26 pmSOF-PDX

23h 26m2 stops

$615KLM

Find Deal

Sun, Oct 26 - Tue, Nov 4

3:54 pm - 10:45 pmPDX-SOF

21h 51m2 stops

6:25 am - 12:46 amSOF-PDX

28h 21m2 stops

$621Lufthansa

Find Deal

Wed, Oct 29 - Sat, Nov 8

7:25 pm - 2:00 pmPDX-SOF

32h 35m1 stop

12:05 pm - 3:55 pmSOF-PDX

37h 50m1 stop

$648British Airways

Find Deal

Fri, Oct 24 - Sat, Nov 8

7:25 pm - 2:00 pmPDX-SOF

32h 35m1 stop

2:30 pm - 3:55 pmSOF-PDX

35h 25m1 stop

$738British Airways

Find Deal

Fri, Oct 24 - Sun, Nov 2

12:55 pm - 2:00 pmPDX-SOF

15h 05m1 stop

7:00 am - 7:19 pmSOF-PDX

22h 19m2 stops

$918KLM

Find Deal

Sun, Oct 5 - Sun, Oct 12

Air Canada flights from Portland to Sofia

Our best Air Canada deals on Portland to Sofia flight tickets

Air Canada

Oct 25

PDX7:40 pmPortland

37h 40m

2 stops

SOF6:20 pmSofia

Nov 6

SOF6:00 amSofia

37h 15m

2 stops

PDX9:15 amPortland

$551

Find similar

Air Canada

Oct 24

PDX9:55 amPortland

17h 30m

2 stops

SOF1:25 pmSofia

Nov 7

SOF6:10 amSofia

22h 20m

2 stops

PDX6:30 pmPortland

$605

Find similar

Air Canada

Dec 6

PDX9:50 amPortland

22h 30m

3 stops

SOF6:20 pmSofia

Dec 11

SOF6:00 amSofia

37h 15m

3 stops

PDX9:15 amPortland

$1,357

Find similar

United Airlines flights from Portland to Sofia

Our best United Airlines deals on Portland to Sofia flight tickets

United Airlines

Oct 27

PDX8:30 amPortland

24h 50m

2 stops

SOF6:20 pmSofia

Nov 6

SOF2:35 pmSofia

19h 51m

2 stops

PDX12:26 amPortland

$566

Find similar

United Airlines

Oct 25

PDX11:59 pmPortland

28h 36m

2 stops

SOF1:35 pmSofia

Nov 5

SOF6:10 amSofia

22h 26m

2 stops

PDX6:36 pmPortland

$570

Find similar

United Airlines

Oct 26

PDX10:05 amPortland

23h 15m

2 stops

SOF6:20 pmSofia

Nov 3

SOF2:20 pmSofia

40h 18m

2 stops

PDX8:38 pmPortland

$585

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sat 10/25

7:40 pm-6:20 pm

2 stops37h 40m

Sofia

Thu 11/6

6:00 am-9:15 am

2 stops37h 15m

$551

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sun 10/26

6:15 am-6:20 pm

2 stops27h 05m

Sofia

Wed 11/5

6:10 am-6:36 pm

2 stops22h 26m

$561

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 10/27

8:30 am-6:20 pm

2 stops24h 50m

Sofia

Thu 11/6

2:35 pm-12:26 am

2 stops19h 51m

$566

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sat 10/25

11:59 pm-1:35 pm

2 stops28h 36m

Sofia

Wed 11/5

6:10 am-6:36 pm

2 stops22h 26m

$570

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sat 10/25

5:15 pm-11:45 pm

2 stops44h 30m

Sofia

Mon 11/3

6:45 pm-10:33 pm

2 stops37h 48m

$600

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sun 10/26

2:25 pm-2:05 pm

1 stop14h 40m

Sofia

Tue 11/4

7:00 am-8:26 pm

2 stops23h 26m

$615

PortlandSofia

PDX - SOF

PDXSOF

Portland

Wed 10/29

3:54 pm-10:45 pm

2 stops21h 51m

Sofia

Sat 11/8

6:25 am-12:46 am

2 stops28h 21m

$621

PortlandSofia

PDX - SOF

PDXSOF

Portland

Fri 10/24

7:25 pm-2:00 pm

1 stop32h 35m

Sofia

Sat 11/8

12:05 pm-3:55 pm

1 stop37h 50m

$648

PortlandSofia

PDX - SOF

PDXSOF

Portland

Fri 10/24

7:25 pm-2:00 pm

1 stop32h 35m

Sofia

Sun 11/2

2:30 pm-3:55 pm

1 stop35h 25m

$738

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sun 10/5

12:55 pm-2:00 pm

1 stop15h 05m

Sofia

Sun 10/12

7:00 am-7:19 pm

2 stops22h 19m

$918

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted 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 $761.

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.

Search flight deals

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 September 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 55% of the total bookings. Other popular airlines include United Airlines with 24%, Lufthansa with 11%, 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 $635	Free Cancellation	Rating 6.8 7,409 reviews	Search Lufthansa flights
United Airlines	PriceFrom $639	Free Cancellation	Rating 7.4 8,926 reviews	Search United Airlines flights
Air Canada	PriceFrom $678	Free Cancellation	Rating 7.1 10,000 reviews	Search Air Canada flights
KLM	PriceFrom $692	Free Cancellation	Rating 7.8 1,386 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.