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

KLM is the most popular carrier operating from Portland to Sofia

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 57% 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.

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 May 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.

$590 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 $814.

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Find the cheapest flights from Portland to Sofia

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

6:03 pm - 11:15 pm

PDX

SOF

19h 12m

2 stops

6:10 am - 9:05 pm

SOF

PDX

24h 55m

2 stops

$814United Airlines

Wed, Jul 29 - Tue, Aug 25

11:40 pm - 11:15 pm

PDX

SOF

37h 35m

2 stops

6:10 am - 9:05 pm

SOF

PDX

24h 55m

2 stops

$820United Airlines

Sat, Aug 1 - Tue, Aug 25

11:05 am - 11:15 pm

PDX

SOF

26h 10m

2 stops

7:25 pm - 10:45 pm

SOF

PDX

37h 20m

2 stops

$830Lufthansa

Wed, Jul 29 - Mon, Aug 24

12:50 pm - 11:15 pm

PDX

SOF

48h 25m

2 stops

7:25 pm - 10:45 pm

SOF

PDX

37h 20m

2 stops

$835Lufthansa

Sat, Aug 1 - Mon, Aug 24

10:00 am - 1:45 pm

PDX

SOF

17h 45m

2 stops

6:00 am - 6:31 pm

SOF

PDX

22h 31m

2 stops

$838Multiple Airlines

Wed, Nov 4 - Sun, Nov 8

7:00 am - 11:15 pm

PDX

SOF

30h 15m

2 stops

6:20 am - 11:02 pm

SOF

PDX

26h 42m

3 stops

$843United Airlines

Mon, Sep 7 - Fri, Oct 16

4:07 pm - 11:15 pm

PDX

SOF

21h 08m

2 stops

6:20 am - 8:13 pm

SOF

PDX

23h 53m

2 stops

$844United Airlines

Mon, Sep 7 - Fri, Oct 16

11:05 am - 11:15 pm

PDX

SOF

26h 10m

2 stops

7:25 pm - 10:45 pm

SOF

PDX

37h 20m

2 stops

$860Lufthansa

Wed, Jul 29 - Wed, Aug 26

8:35 am - 6:40 pm

PDX

SOF

24h 05m

3 stops

6:20 am - 8:10 pm

SOF

PDX

23h 50m

2 stops

$862United Airlines

Wed, Jul 29 - Mon, Aug 24

5:15 am - 6:40 pm

PDX

SOF

27h 25m

3 stops

6:20 am - 9:03 pm

SOF

PDX

24h 43m

2 stops

$863United Airlines

Tue, Aug 4 - Wed, Aug 26

British Airways flights from Portland to Sofia

Our best British Airways deals on Portland to Sofia flight tickets

British Airways

Jul 8

PDX7:30 pmPortland

31h 55m

1 stop

SOF1:25 pmSofia

Jul 15

SOF9:25 pmSofia

36h 05m

2 stops

PDX11:30 pmPortland

$990

British Airways

Jul 29

PDX7:30 pmPortland

31h 55m

1 stop

SOF1:25 pmSofia

Aug 26

SOF9:25 pmSofia

30h 15m

1 stop

PDX5:40 pmPortland

$1,116

British Airways

Jul 29

PDX7:30 pmPortland

31h 55m

1 stop

SOF1:25 pmSofia

Aug 24

SOF8:10 pmSofia

37h 49m

2 stops

PDX11:59 pmPortland

$1,123

United Airlines flights from Portland to Sofia

Our best United Airlines deals on Portland to Sofia flight tickets

United Airlines

Jul 29

PDX8:35 amPortland

24h 05m

3 stops

SOF6:40 pmSofia

Aug 25

SOF6:10 amSofia

24h 55m

2 stops

PDX9:05 pmPortland

$814

United Airlines

Aug 1

PDX11:40 pmPortland

37h 35m

2 stops

SOF11:15 pmSofia

Aug 25

SOF6:10 amSofia

24h 55m

2 stops

PDX9:05 pmPortland

$820

United Airlines

Sep 7

PDX7:00 amPortland

30h 15m

2 stops

SOF11:15 pmSofia

Oct 16

SOF6:20 amSofia

26h 42m

3 stops

PDX11:02 pmPortland

$843

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandSofia

PDX - SOF

PDXSOF

Portland

Wed 7/29

6:03 pm-11:15 pm

2 stops19h 12m

Sofia

Tue 8/25

6:10 am-9:05 pm

2 stops24h 55m

$814

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sat 8/1

11:40 pm-11:15 pm

2 stops37h 35m

Sofia

Tue 8/25

6:10 am-9:05 pm

2 stops24h 55m

$820

PortlandSofia

PDX - SOF

PDXSOF

Portland

Wed 7/29

11:05 am-11:15 pm

2 stops26h 10m

Sofia

Mon 8/24

7:25 pm-10:45 pm

2 stops37h 20m

$830

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sat 8/1

12:50 pm-11:15 pm

2 stops48h 25m

Sofia

Mon 8/24

7:25 pm-10:45 pm

2 stops37h 20m

$835

Quickest round-trip

PortlandSofia

PDX - SOF

PDXSOF

Portland

Wed 11/4

10:00 am-1:45 pm

2 stops17h 45m

Sofia

Sun 11/8

6:00 am-6:31 pm

2 stops22h 31m

$838

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 9/7

7:00 am-11:15 pm

2 stops30h 15m

Sofia

Fri 10/16

6:20 am-11:02 pm

3 stops26h 42m

$843

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 9/7

4:07 pm-11:15 pm

2 stops21h 08m

Sofia

Fri 10/16

6:20 am-8:13 pm

2 stops23h 53m

$844

PortlandSofia

PDX - SOF

PDXSOF

Portland

Wed 7/29

11:05 am-11:15 pm

2 stops26h 10m

Sofia

Wed 8/26

7:25 pm-10:45 pm

2 stops37h 20m

$860

PortlandSofia

PDX - SOF

PDXSOF

Portland

Wed 7/29

8:35 am-6:40 pm

3 stops24h 05m

Sofia

Mon 8/24

6:20 am-8:10 pm

2 stops23h 50m

$862

PortlandSofia

PDX - SOF

PDXSOF

Portland

Tue 8/4

5:15 am-6:40 pm

3 stops27h 25m

Sofia

Wed 8/26

6:20 am-9:03 pm

2 stops24h 43m

$863

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.

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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 May 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 57% of the total bookings. Other popular airlines include United Airlines with 29% and Lufthansa with 14%.

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 1,517 reviews	Search KLM flights
Lufthansa	PriceFrom $555	Free Cancellation	Rating 6.8 8,010 reviews	Search Lufthansa flights
United Airlines	PriceFrom $635	Free Cancellation	Rating 7.4 9,736 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 $590

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 6/16. 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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Cabin classes currently available on flights to Sofia

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

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