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.

$345 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

7:00 pm - 1:50 pmPDX-SOF

33h 50m2 stops

6:00 am - 9:15 amSOF-PDX

37h 15m3 stops

$555

Find Deal

Tue, Oct 28 - Tue, Nov 4

7:00 pm - 1:50 pmPDX-SOF

33h 50m2 stops

6:00 am - 6:36 pmSOF-PDX

22h 36m2 stops

$561

Find Deal

Tue, Oct 28 - Tue, Nov 4

6:00 am - 10:45 pmPDX-SOF

31h 45m2 stops

6:10 am - 12:26 amSOF-PDX

28h 16m3 stops

$565United Airlines

Find Deal

Mon, Oct 27 - Wed, Nov 5

9:58 am - 2:05 pmPDX-SOF

19h 07m2 stops

7:00 am - 11:25 amSOF-PDX

14h 25m1 stop

$584

Find Deal

Mon, Oct 27 - Wed, Nov 5

2:25 pm - 2:05 pmPDX-SOF

14h 40m1 stop

7:00 am - 11:25 amSOF-PDX

14h 25m1 stop

$605KLM

Find Deal

Mon, Oct 27 - Wed, Nov 5

3:41 pm - 10:45 pmPDX-SOF

22h 04m2 stops

7:05 pm - 8:49 pmSOF-PDX

34h 44m2 stops

$629Lufthansa

Find Deal

Thu, Mar 12 - Mon, Mar 16

3:41 pm - 10:45 pmPDX-SOF

22h 04m2 stops

1:55 pm - 8:49 pmSOF-PDX

39h 54m2 stops

$633United Airlines

Find Deal

Thu, Mar 12 - Mon, Mar 16

9:50 am - 6:15 pmPDX-SOF

23h 25m3 stops

6:00 am - 9:15 amSOF-PDX

37h 15m3 stops

$820Air Canada

Find Deal

Tue, Oct 28 - Tue, Nov 4

7:00 am - 2:05 pmPDX-SOF

22h 05m2 stops

7:00 am - 12:25 pmSOF-PDX

14h 25m1 stop

$1,121KLM

Find Deal

Thu, Mar 12 - Mon, Mar 16

9:50 am - 6:20 pmPDX-SOF

22h 30m3 stops

6:00 am - 9:15 amSOF-PDX

37h 15m3 stops

$1,357Air Canada

Find Deal

Sat, Dec 6 - Thu, Dec 11

Air Canada flights from Portland to Sofia

Our best Air Canada deals on Portland to Sofia flight tickets

Air Canada

Oct 28

PDX9:50 amPortland

23h 25m

3 stops

SOF6:15 pmSofia

Nov 4

SOF6:00 amSofia

37h 15m

3 stops

PDX9:15 amPortland

$820

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

PDX6:00 amPortland

31h 45m

2 stops

SOF10:45 pmSofia

Nov 5

SOF6:10 amSofia

28h 16m

3 stops

PDX12:26 amPortland

$565

Find similar

United Airlines

Mar 12

PDX3:41 pmPortland

22h 04m

2 stops

SOF10:45 pmSofia

Mar 16

SOF1:55 pmSofia

39h 54m

2 stops

PDX8:49 pmPortland

$633

Find similar

United Airlines

Mar 12

PDX7:30 pmPortland

18h 15m

2 stops

SOF10:45 pmSofia

Mar 16

SOF1:55 pmSofia

54h 54m

3 stops

PDX11:49 amPortland

$640

Find similar

Fly from

Fly to

Route

Depart

Return

Price

PortlandSofia

PDX - SOF

PDXSOF

Portland

Tue 10/28

7:00 pm-1:50 pm

2 stops33h 50m

Sofia

Tue 11/4

6:00 am-9:15 am

3 stops37h 15m

$555

PortlandSofia

PDX - SOF

PDXSOF

Portland

Tue 10/28

7:00 pm-1:50 pm

2 stops33h 50m

Sofia

Tue 11/4

6:00 am-6:36 pm

2 stops22h 36m

$561

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 10/27

6:00 am-10:45 pm

2 stops31h 45m

Sofia

Wed 11/5

6:10 am-12:26 am

3 stops28h 16m

$565

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 10/27

9:58 am-2:05 pm

2 stops19h 07m

Sofia

Wed 11/5

7:00 am-11:25 am

1 stop14h 25m

$584

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 10/27

2:25 pm-2:05 pm

1 stop14h 40m

Sofia

Wed 11/5

7:00 am-11:25 am

1 stop14h 25m

$605

PortlandSofia

PDX - SOF

PDXSOF

Portland

Thu 3/12

3:41 pm-10:45 pm

2 stops22h 04m

Sofia

Mon 3/16

7:05 pm-8:49 pm

2 stops34h 44m

$629

PortlandSofia

PDX - SOF

PDXSOF

Portland

Thu 3/12

3:41 pm-10:45 pm

2 stops22h 04m

Sofia

Mon 3/16

1:55 pm-8:49 pm

2 stops39h 54m

$633

PortlandSofia

PDX - SOF

PDXSOF

Portland

Tue 10/28

9:50 am-6:15 pm

3 stops23h 25m

Sofia

Tue 11/4

6:00 am-9:15 am

3 stops37h 15m

$820

PortlandSofia

PDX - SOF

PDXSOF

Portland

Thu 3/12

7:00 am-2:05 pm

2 stops22h 05m

Sofia

Mon 3/16

7:00 am-12:25 pm

1 stop14h 25m

$1,121

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sat 12/6

9:50 am-6:20 pm

3 stops22h 30m

Sofia

Thu 12/11

6:00 am-9:15 am

3 stops37h 15m

$1,357

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.

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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 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 56% of the total bookings. Other popular airlines include United Airlines with 23%, 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 8,931 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 1,385 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.

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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.