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 56% of people opting to fly with this airline when traveling to Sofia. Keep in mind that there are 3 different airlines that fly to Sofia on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Portland to Sofia?

KLM is the most popular carrier operating from Portland to Sofia

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 April 2026, there are 3 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.

$520 Cheap Flights from Portland to Sofia in 2026

Q: What is the typical price of a round-trip flight between Portland and Sofia?

Prices are currently high for flights on this route. Typical prices usually range from $692 to $555. The lowest price recently found on this route was $911.

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Find the cheapest flights from Portland to Sofia

Round-trip

One-way

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:00 am - 12:15 pm

PDX

SOF

19h 15m

2 stops

7:25 pm - 8:55 pm

SOF

PDX

35h 30m

2 stops

$911Multiple Airlines

Mon, Aug 3 - Sat, Aug 22

10:10 am - 6:40 pm

PDX

SOF

22h 30m

2 stops

6:10 am - 9:30 am

SOF

PDX

37h 20m

2 stops

$937Air Canada

Wed, May 6 - Wed, May 27

3:30 pm - 6:40 pm

PDX

SOF

17h 10m

2 stops

6:10 am - 9:31 am

SOF

PDX

37h 21m

2 stops

$943Multiple Airlines

Mon, Jun 8 - Fri, Jun 19

3:30 pm - 6:40 pm

PDX

SOF

17h 10m

2 stops

6:10 am - 9:31 am

SOF

PDX

37h 21m

2 stops

$944Multiple Airlines

Mon, Jun 8 - Fri, Jun 19

7:45 pm - 11:15 pm

PDX

SOF

41h 30m

2 stops

3:40 pm - 10:35 pm

SOF

PDX

40h 55m

2 stops

$947Multiple Airlines

Mon, May 11 - Mon, May 18

7:30 pm - 1:25 pm

PDX

SOF

31h 55m

1 stop

9:25 pm - 5:40 pm

SOF

PDX

30h 15m

1 stop

$956British Airways

Wed, May 6 - Wed, May 27

11:17 am - 2:00 pm

PDX

SOF

16h 43m

2 stops

7:00 am - 11:10 am

SOF

PDX

14h 10m

1 stop

$993Multiple Airlines

Mon, Aug 3 - Sat, Aug 22

8:40 am - 6:00 pm

PDX

SOF

23h 20m

2 stops

6:20 am - 8:58 pm

SOF

PDX

24h 38m

3 stops

$1,023United Airlines

Mon, May 11 - Mon, May 18

1:05 pm - 2:00 pm

PDX

SOF

14h 55m

1 stop

7:00 am - 11:10 am

SOF

PDX

14h 10m

1 stop

$1,032KLM

Mon, Aug 3 - Sat, Aug 22

3:15 pm - 11:15 pm

PDX

SOF

22h 00m

2 stops

6:10 am - 5:46 pm

SOF

PDX

21h 36m

2 stops

$1,033Lufthansa

Sun, May 17 - Sun, May 24

Lufthansa flights from Portland to Sofia

Our best Lufthansa deals on Portland to Sofia flight tickets

Lufthansa

May 17

PDX3:15 pmPortland

22h 00m

2 stops

SOF11:15 pmSofia

May 24

SOF6:10 amSofia

21h 36m

2 stops

PDX5:46 pmPortland

$1,033

Lufthansa

May 17

PDX3:15 pmPortland

22h 00m

2 stops

SOF11:15 pmSofia

May 24

SOF6:10 amSofia

26h 53m

2 stops

PDX11:03 pmPortland

$1,073

United Airlines flights from Portland to Sofia

Our best United Airlines deals on Portland to Sofia flight tickets

United Airlines

May 3

PDX5:30 amPortland

31h 45m

3 stops

SOF11:15 pmSofia

May 27

SOF6:20 amSofia

26h 09m

2 stops

PDX10:29 pmPortland

$951

United Airlines

May 11

PDX8:40 amPortland

23h 20m

2 stops

SOF6:00 pmSofia

May 18

SOF6:20 amSofia

24h 38m

3 stops

PDX8:58 pmPortland

$1,023

United Airlines

May 26

PDX8:35 amPortland

28h 40m

2 stops

SOF11:15 pmSofia

Jul 1

SOF6:20 amSofia

26h 28m

2 stops

PDX10:48 pmPortland

$1,155

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 8/3

7:00 am-12:15 pm

2 stops19h 15m

Sofia

Sat 8/22

7:25 pm-8:55 pm

2 stops35h 30m

$911

PortlandSofia

PDX - SOF

PDXSOF

Portland

Wed 5/6

10:10 am-6:40 pm

2 stops22h 30m

Sofia

Wed 5/27

6:10 am-9:30 am

2 stops37h 20m

$937

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 6/8

3:30 pm-6:40 pm

2 stops17h 10m

Sofia

Fri 6/19

6:10 am-9:31 am

2 stops37h 21m

$943

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 6/8

3:30 pm-6:40 pm

2 stops17h 10m

Sofia

Fri 6/19

6:10 am-9:31 am

2 stops37h 21m

$944

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 5/11

7:45 pm-11:15 pm

2 stops41h 30m

Sofia

Mon 5/18

3:40 pm-10:35 pm

2 stops40h 55m

$947

PortlandSofia

PDX - SOF

PDXSOF

Portland

Wed 5/6

7:30 pm-1:25 pm

1 stop31h 55m

Sofia

Wed 5/27

9:25 pm-5:40 pm

1 stop30h 15m

$956

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 8/3

11:17 am-2:00 pm

2 stops16h 43m

Sofia

Sat 8/22

7:00 am-11:10 am

1 stop14h 10m

$993

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 5/11

8:40 am-6:00 pm

2 stops23h 20m

Sofia

Mon 5/18

6:20 am-8:58 pm

3 stops24h 38m

$1,023

Quickest round-trip

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 8/3

1:05 pm-2:00 pm

1 stop14h 55m

Sofia

Sat 8/22

7:00 am-11:10 am

1 stop14h 10m

$1,032

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sun 5/17

3:15 pm-11:15 pm

2 stops22h 00m

Sofia

Sun 5/24

6:10 am-5:46 pm

2 stops21h 36m

$1,033

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 typical price of a round-trip flight between Portland and Sofia?

What is the cheapest month to fly to Sofia?

The cheapest month to fly to Sofia from Portland is in April. Flight prices, which tend to average around $595, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of April, then book flights to Sofia from Portland during March instead. Flights to Sofia in March, while not as cheap as those in April, still average around $684.

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

Fastest flight time	17h 10m
Direct flights	None

The fastest flight from Portland to Sofia takes 17h 10m

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

Search flight deals

Frequently asked questions about flying from Portland to Sofia

How far is Portland to Sofia by plane?
A flight from Portland to Sofia will travel around 5988.5 mi. 17h 10m 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 April 2026, there are 3 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 29% and Lufthansa with 15%.

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
KLM	PriceFrom $555	Free Cancellation	Rating 7.8 1,508 reviews	Search KLM flights
Lufthansa	PriceFrom $635	Free Cancellation	Rating 6.8 7,954 reviews	Search Lufthansa flights
United Airlines	PriceFrom $639	Free Cancellation	Rating 7.4 9,658 reviews	Search United Airlines flights

Bansko

Borovets

Velingrad

Sandanski

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Portland to Sofia. momondo saves you time and could save you money on your trip.

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.

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Cheap flights from Portland to Sofia from $520

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Portland to Sofia departing on 5/4. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

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How to get the cheapest flight ticket from Portland to Sofia

What is the typical price of a round-trip flight between Portland and Sofia?

What is the cheapest month to fly to Sofia?

What is the cheapest airline that flies from Portland to Sofia?

What airlines fly to Sofia?

When to book flights from Portland to Sofia

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

Fastest flight time

Direct flights

Frequently asked questions about flying from Portland to Sofia

Best airlines flying from Portland to Sofia

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

Traveling to a place near Sofia?

Why use momondo?

An easier way to manage your Sofia trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

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List of cabin classes available on flights landing in Sofia. Availability may vary depending on flight origin and airline.

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