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 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?

United Airlines 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 March 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.

$229 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 typical for flights on this route. Typical prices usually range from $684 to $747. The lowest price recently found on this route was $712.

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

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.

11:05 am - 6:40 pm

PDX

SOF

21h 35m

2 stops

6:10 am - 8:50 pm

SOF

PDX

24h 40m

2 stops

$712United Airlines

Mon, Jul 13 - Tue, Aug 18

8:50 am - 6:40 pm

PDX

SOF

23h 50m

2 stops

2:20 pm - 8:50 pm

SOF

PDX

40h 30m

2 stops

$732United Airlines

Mon, Jul 13 - Mon, Aug 17

11:05 am - 6:40 pm

PDX

SOF

21h 35m

2 stops

6:20 am - 2:51 pm

SOF

PDX

18h 31m

2 stops

$733United Airlines

Wed, Jul 29 - Sat, Aug 15

7:14 pm - 11:00 pm

PDX

SOF

41h 46m

2 stops

12:55 pm - 10:54 pm

SOF

PDX

43h 59m

2 stops

$779United Airlines

Sat, Apr 11 - Sat, Apr 18

11:30 pm - 12:10 pm

PDX

SOF

26h 40m

2 stops

6:20 am - 12:50 am

SOF

PDX

28h 30m

3 stops

$799United Airlines

Sat, Jul 4 - Fri, Jul 24

8:35 am - 6:40 pm

PDX

SOF

24h 05m

3 stops

6:20 am - 2:51 pm

SOF

PDX

18h 31m

2 stops

$814United Airlines

Wed, Jul 29 - Sat, Aug 15

7:00 am - 2:00 pm

PDX

SOF

21h 00m

2 stops

7:00 am - 11:10 am

SOF

PDX

14h 10m

1 stop

$840KLM

Mon, Jul 13 - Tue, Aug 18

3:30 pm - 1:25 pm

PDX

SOF

35h 55m

2 stops

6:30 am - 7:06 pm

SOF

PDX

22h 36m

2 stops

$901Lufthansa

Sun, May 24 - Thu, Oct 15

10:40 pm - 6:40 pm

PDX

SOF

34h 00m

2 stops

6:20 am - 12:50 am

SOF

PDX

28h 30m

3 stops

$937United Airlines

Sat, Jul 4 - Fri, Jul 17

10:40 pm - 10:55 am

PDX

SOF

26h 15m

2 stops

6:20 am - 12:50 am

SOF

PDX

28h 30m

3 stops

$938United Airlines

Sun, Jul 5 - Fri, Jul 17

Lufthansa flights from Portland to Sofia

Our best Lufthansa deals on Portland to Sofia flight tickets

Lufthansa

May 24

PDX3:30 pmPortland

35h 55m

2 stops

SOF1:25 pmSofia

Oct 15

SOF6:30 amSofia

22h 36m

2 stops

PDX7:06 pmPortland

$901

Lufthansa

Jun 15

PDX3:30 pmPortland

40h 30m

2 stops

SOF6:00 pmSofia

Jun 29

SOF12:55 pmSofia

19h 35m

2 stops

PDX10:30 pmPortland

$1,036

Lufthansa

Jun 15

PDX3:30 pmPortland

40h 30m

2 stops

SOF6:00 pmSofia

Jul 1

SOF6:10 amSofia

21h 34m

2 stops

PDX5:44 pmPortland

$1,038

KLM flights from Portland to Sofia

Our best KLM deals on Portland to Sofia flight tickets

KLM

Jul 13

PDX7:00 amPortland

21h 00m

2 stops

SOF2:00 pmSofia

Aug 18

SOF7:00 amSofia

14h 10m

1 stop

PDX11:10 amPortland

$840

KLM

Jun 30

PDX9:40 amPortland

18h 20m

2 stops

SOF2:00 pmSofia

Jul 9

SOF7:00 amSofia

23h 49m

2 stops

PDX8:49 pmPortland

$946

KLM

May 24

PDX1:05 pmPortland

14h 55m

1 stop

SOF2:00 pmSofia

Oct 15

SOF7:00 amSofia

23h 50m

2 stops

PDX8:50 pmPortland

$960

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 7/13

11:05 am-6:40 pm

2 stops21h 35m

Sofia

Tue 8/18

6:10 am-8:50 pm

2 stops24h 40m

$712

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 7/13

8:50 am-6:40 pm

2 stops23h 50m

Sofia

Mon 8/17

2:20 pm-8:50 pm

2 stops40h 30m

$732

PortlandSofia

PDX - SOF

PDXSOF

Portland

Wed 7/29

11:05 am-6:40 pm

2 stops21h 35m

Sofia

Sat 8/15

6:20 am-2:51 pm

2 stops18h 31m

$733

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sat 4/11

7:14 pm-11:00 pm

2 stops41h 46m

Sofia

Sat 4/18

12:55 pm-10:54 pm

2 stops43h 59m

$779

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sat 7/4

11:30 pm-12:10 pm

2 stops26h 40m

Sofia

Fri 7/24

6:20 am-12:50 am

3 stops28h 30m

$799

PortlandSofia

PDX - SOF

PDXSOF

Portland

Wed 7/29

8:35 am-6:40 pm

3 stops24h 05m

Sofia

Sat 8/15

6:20 am-2:51 pm

2 stops18h 31m

$814

Quickest round-trip

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 7/13

7:00 am-2:00 pm

2 stops21h 00m

Sofia

Tue 8/18

7:00 am-11:10 am

1 stop14h 10m

$840

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sun 5/24

3:30 pm-1:25 pm

2 stops35h 55m

Sofia

Thu 10/15

6:30 am-7:06 pm

2 stops22h 36m

$901

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sat 7/4

10:40 pm-6:40 pm

2 stops34h 00m

Sofia

Fri 7/17

6:20 am-12:50 am

3 stops28h 30m

$937

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sun 7/5

10:40 pm-10:55 am

2 stops26h 15m

Sofia

Fri 7/17

6:20 am-12:50 am

3 stops28h 30m

$938

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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 March. Flight prices, which tend to average around $684, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of March, then book flights to Sofia from Portland during May instead. Flights to Sofia in May, while not as cheap as those in March, still average around $687.

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	21h 35m
Direct flights	None

The fastest flight from Portland to Sofia takes 21h 35m

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. 21h 35m 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 March 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 55% of the total bookings. Other popular airlines include United Airlines with 31% 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 1,473 reviews	Search KLM flights
Lufthansa	PriceFrom $635	Free Cancellation	Rating 6.8 7,858 reviews	Search Lufthansa flights
United Airlines	PriceFrom $639	Free Cancellation	Rating 7.4 9,432 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.

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.

Start using Trips

Find my bookings

Get notified when prices go down

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

1 adult

Thu 4/16

Thu 4/23

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Bulgaria

Airlines

Cabin classes

Other Bulgaria destinations

Other flights from Portland

Complete your trip

Feeling lucky

Fly your favorite airline to Sofia

KLM

United Airlines

Lufthansa

Cheap flights from Portland to Sofia from $229

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 4/27. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Portland to Sofia

Cheap round-trip flights

Cheap one-way flights

Lufthansa flights from Portland to Sofia

Our best Lufthansa deals on Portland to Sofia flight tickets

KLM flights from Portland to Sofia

Our best KLM deals on Portland to Sofia flight tickets

momondo Fare Finder

Use the filters below to find and compare flights from Portland to Sofia that are best for you.

See travel insights to Sofia from

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

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.

Find better results for your trip to Bulgaria

Fly your favorite airline to Sofia

Airlines are sorted and displayed according to clicks in the past 7 days on momondo

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.

Popular cities in Bulgaria

Popular flights according to clicks in the last 7 days on momondo

Fly to other destinations from Portland

According to popular flight searches on momondo this year

Complete your trip to Sofia

Explore popular destinations other users love

According to popular flight searches on momondo this year