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 52% 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 October 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.

$720 Cheap Flights from Portland to Sofia in 2026/27

Discover deals from 900+ travel sites with momondo.

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.

7:10 pm - 6:40 pmPDX Portland-SOF Sofia

37h 30m2 stops Vancouver Intl Munich Franz Josef Strauss

12:55 pm - 9:25 amSOF Sofia-PDX Portland

30h 30m2 stops Munich Franz Josef Strauss Vancouver Intl

$720Air Canada

Sun, Apr 18 - Wed, Apr 21

1:39 pm - 10:50 pmPDX Portland-SOF Sofia

23h 11m2 stops San Francisco Frankfurt am Main

6:20 am - 8:33 pmSOF Sofia-PDX Portland

24h 13m3 stops Frankfurt am Main Chicago O'Hare Intl San Francisco

$744United Airlines

Sun, Apr 18 - Wed, Apr 21

7:30 am - 6:10 pmPDX Portland-SOF Sofia

24h 40m2 stops San Francisco Frankfurt am Main

6:20 am - 8:33 pmSOF Sofia-PDX Portland

24h 13m3 stops Frankfurt am Main Chicago O'Hare Intl San Francisco

$744United Airlines

Sun, Apr 18 - Wed, Apr 21

3:40 pm - 10:55 pmPDX Portland-SOF Sofia

21h 15m2 stops San Francisco Munich Franz Josef Strauss

6:25 am - 6:31 pmSOF Sofia-PDX Portland

22h 06m2 stops Frankfurt am Main Vancouver Intl

$763Multiple Airlines

Thu, Jan 14 - Thu, Feb 4

3:44 pm - 10:55 pmPDX Portland-SOF Sofia

21h 11m2 stops San Francisco Munich Franz Josef Strauss

6:25 am - 6:31 pmSOF Sofia-PDX Portland

22h 06m2 stops Frankfurt am Main Vancouver Intl

$785Multiple Airlines

Wed, Dec 2 - Wed, Dec 9

10:00 am - 10:55 pmPDX Portland-SOF Sofia

26h 55m2 stops Vancouver Intl Munich Franz Josef Strauss

6:00 am - 2:41 pmSOF Sofia-PDX Portland

18h 41m3 stops Munich Franz Josef Strauss Frankfurt am Main Vancouver Intl

$791Multiple Airlines

Thu, Jan 14 - Thu, Feb 4

8:30 am - 10:55 pmPDX Portland-SOF Sofia

28h 25m2 stops Washington, D.C. Dulles Intl Munich Franz Josef Strauss

6:25 am - 10:45 pmSOF Sofia-PDX Portland

26h 20m2 stops Frankfurt am Main San Francisco

$795United Airlines

Wed, Nov 18 - Thu, Dec 3

7:00 am - 1:15 pmPDX Portland-SOF Sofia

20h 15m2 stops Chicago O'Hare Intl Munich Franz Josef Strauss

6:25 am - 11:15 pmSOF Sofia-PDX Portland

26h 50m2 stops Frankfurt am Main Houston George Bush Intcntl

$795United Airlines

Mon, Nov 16 - Thu, Dec 3

8:30 am - 10:55 pmPDX Portland-SOF Sofia

28h 25m2 stops Washington, D.C. Dulles Intl Munich Franz Josef Strauss

6:25 am - 9:15 pmSOF Sofia-PDX Portland

24h 50m2 stops Frankfurt am Main Denver Intl

$795United Airlines

Tue, Nov 17 - Thu, Dec 3

9:00 am - 10:55 pmPDX Portland-SOF Sofia

27h 55m3 stops San Francisco Chicago O'Hare Intl Munich Franz Josef Strauss

6:25 am - 11:15 pmSOF Sofia-PDX Portland

26h 50m2 stops Frankfurt am Main Houston George Bush Intcntl

$795United Airlines

Tue, Nov 17 - Thu, Dec 3

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British Airways flights from Portland to Sofia

Our best British Airways deals on Portland to Sofia flight tickets

British Airways

Nov 4

PDX1:22 pmPortland

43h 58m

2 stops

SOF7:20 pmSofia

Nov 8

SOF7:45 pmSofia

30h 05m

1 stop

PDX3:50 pmPortland

$1,009

British Airways

Nov 4

PDX11:57 amPortland

45h 23m

2 stops

SOF7:20 pmSofia

Nov 8

SOF7:45 pmSofia

30h 05m

1 stop

PDX3:50 pmPortland

$1,054

United Airlines flights from Portland to Sofia

Our best United Airlines deals on Portland to Sofia flight tickets

United Airlines

Nov 17

PDX9:00 amPortland

27h 55m

3 stops

SOF10:55 pmSofia

Dec 3

SOF6:25 amSofia

26h 50m

2 stops

PDX11:15 pmPortland

$795

United Airlines

Nov 15

PDX9:00 amPortland

27h 55m

2 stops

SOF10:55 pmSofia

Dec 2

SOF2:00 pmSofia

38h 23m

2 stops

PDX6:23 pmPortland

$807

United Airlines

Nov 16

PDX7:10 amPortland

29h 45m

2 stops

SOF10:55 pmSofia

Dec 2

SOF2:00 pmSofia

38h 23m

2 stops

PDX6:23 pmPortland

$813

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandSofia

PDX Portland - SOF Sofia

PDXSOF

Portland

Sun 4/18

7:10 pm-6:40 pm

2 stops37h 30m

Sofia

Wed 4/21

12:55 pm-9:25 am

2 stops30h 30m

$720

PortlandSofia

PDX Portland - SOF Sofia

PDXSOF

Portland

Sun 4/18

1:39 pm-10:50 pm

2 stops23h 11m

Sofia

Wed 4/21

6:20 am-8:33 pm

3 stops24h 13m

$744

PortlandSofia

PDX Portland - SOF Sofia

PDXSOF

Portland

Sun 4/18

7:30 am-6:10 pm

2 stops24h 40m

Sofia

Wed 4/21

6:20 am-8:33 pm

3 stops24h 13m

$744

PortlandSofia

PDX Portland - SOF Sofia

PDXSOF

Portland

Thu 1/14

3:40 pm-10:55 pm

2 stops21h 15m

Sofia

Thu 2/4

6:25 am-6:31 pm

2 stops22h 06m

$763

Quickest round-trip

PortlandSofia

PDX Portland - SOF Sofia

PDXSOF

Portland

Wed 12/2

3:44 pm-10:55 pm

2 stops21h 11m

Sofia

Wed 12/9

6:25 am-6:31 pm

2 stops22h 06m

$785

PortlandSofia

PDX Portland - SOF Sofia

PDXSOF

Portland

Thu 1/14

10:00 am-10:55 pm

2 stops26h 55m

Sofia

Thu 2/4

6:00 am-2:41 pm

3 stops18h 41m

$791

PortlandSofia

PDX Portland - SOF Sofia

PDXSOF

Portland

Wed 11/18

8:30 am-10:55 pm

2 stops28h 25m

Sofia

Thu 12/3

6:25 am-10:45 pm

2 stops26h 20m

$795

PortlandSofia

PDX Portland - SOF Sofia

PDXSOF

Portland

Mon 11/16

7:00 am-1:15 pm

2 stops20h 15m

Sofia

Thu 12/3

6:25 am-11:15 pm

2 stops26h 50m

$795

PortlandSofia

PDX Portland - SOF Sofia

PDXSOF

Portland

Tue 11/17

8:30 am-10:55 pm

2 stops28h 25m

Sofia

Thu 12/3

6:25 am-9:15 pm

2 stops24h 50m

$795

PortlandSofia

PDX Portland - SOF Sofia

PDXSOF

Portland

Tue 11/17

9:00 am-10:55 pm

3 stops27h 55m

Sofia

Thu 12/3

6:25 am-11:15 pm

2 stops26h 50m

$795

Flights are sorted by cheapest round-trip flights first.

Sorted 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 January. Flight prices, which tend to average around $0, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of January, then book flights to Sofia from Portland during April instead. Flights to Sofia in April, while not as cheap as those in January, still average around $595.

Can stopping save me money on Portland to Sofia flights?

You could potentially save up to 17% on your flight if you consider stops on a Portland to Sofia flight.

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

Best Price Found	$720
Fastest flight time	21h 11m
Direct flights	None

The best flight deal from Portland to Sofia found on momondo in the last 72 hours is $720

The fastest flight from Portland to Sofia takes 21h 11m

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. 21h 11m 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 October 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 52% of the total bookings. Other popular airlines include United Airlines with 32% and Lufthansa with 16%.

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 1,591 reviews	Search KLM flights
Lufthansa	PriceFrom $555	Free Cancellation	Rating 6.8 8,281 reviews	Search Lufthansa flights
United Airlines	PriceFrom $638	Free Cancellation	Rating 7.3 10,390 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 $720

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Portland to Sofia departing on 4/18. 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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British Airways flights from Portland to Sofia

Our best British Airways deals on Portland to Sofia flight tickets

United Airlines flights from Portland to Sofia

Our best United Airlines deals on Portland to Sofia flight tickets

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How to get the cheapest flight ticket from Portland to Sofia

What is the cheapest month to fly to Sofia?

Can stopping save me money on Portland to Sofia flights?

What airlines fly to Sofia?

When to book flights from Portland to Sofia

Cheap Portland to Sofia (PDX to SOF) flight deals and tips

Best Price Found

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.

Find better results for your trip to Bulgaria

Fly your favorite airline to Sofia

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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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