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Cheap flights from Portland to Sofia from $855

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 5/20. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Portland to Sofia

Cheap round-trip flights

Enter your travel dates to find the best prices.
British Airways Logo
7:30 pm - 1:25 pm
PDX
-
SOF
31h 55m
1 stop
British Airways Logo
9:25 pm - 5:40 pm
SOF
-
PDX
30h 15m
1 stop
$855British Airways
Wed, May 20 - Wed, Jun 10
SWISS Logo
10:45 am - 3:05 pm
PDX
-
SOF
18h 20m
2 stops
SWISS Logo
11:05 am - 11:09 pm
SOF
-
PDX
22h 04m
2 stops
$859SWISS
Thu, Aug 27 - Wed, Sep 2
British Airways Logo
7:30 pm - 1:25 pm
PDX
-
SOF
31h 55m
1 stop
British Airways Logo
9:25 pm - 10:51 pm
SOF
-
PDX
35h 26m
2 stops
$898British Airways
Wed, May 20 - Wed, Jun 10
United Airlines Logo
7:45 pm - 11:15 pm
PDX
-
SOF
41h 30m
2 stops
United Airlines Logo
6:10 am - 10:59 pm
SOF
-
PDX
26h 49m
2 stops
$949United Airlines
Thu, May 7 - Thu, May 14
KLM Logo
7:00 am - 2:00 pm
PDX
-
SOF
21h 00m
2 stops
KLM Logo
7:00 am - 11:10 am
SOF
-
PDX
14h 10m
1 stop
$969KLM
Thu, Aug 27 - Wed, Sep 2
KLM Logo
9:20 am - 2:00 pm
PDX
-
SOF
18h 40m
2 stops
KLM Logo
7:00 am - 11:10 am
SOF
-
PDX
14h 10m
1 stop
$971KLM
Sun, May 17 - Tue, May 26
Multiple Airlines Logo
7:00 am - 8:15 pm
PDX
-
SOF
27h 15m
2 stops
Multiple Airlines Logo
9:05 pm - 9:28 pm
SOF
-
PDX
34h 23m
2 stops
$975Multiple Airlines
Thu, May 7 - Thu, May 14
Lufthansa Logo
7:15 am - 11:15 pm
PDX
-
SOF
30h 00m
2 stops
Lufthansa Logo
6:10 am - 4:47 pm
SOF
-
PDX
20h 37m
2 stops
$978Lufthansa
Sun, May 17 - Tue, May 26
KLM Logo
1:05 pm - 2:00 pm
PDX
-
SOF
14h 55m
1 stop
KLM Logo
7:00 am - 11:10 am
SOF
-
PDX
14h 10m
1 stop
$980KLM
Thu, May 7 - Thu, May 14
British Airways Logo
7:30 pm - 1:25 pm
PDX
-
SOF
31h 55m
1 stop
British Airways Logo
9:25 pm - 11:56 pm
SOF
-
PDX
36h 31m
2 stops
$989British Airways
Wed, May 27 - Wed, Jun 3

British Airways flights from Portland to Sofia

Our best British Airways deals on Portland to Sofia flight tickets
British Airways
May 20
PDX7:30 pmPortland
31h 55m
1 stop
SOF1:25 pmSofia
Jun 10
SOF9:25 pmSofia
30h 15m
1 stop
PDX5:40 pmPortland
$855
British Airways
May 20
PDX7:30 pmPortland
31h 55m
1 stop
SOF1:25 pmSofia
Jun 10
SOF9:25 pmSofia
35h 26m
2 stops
PDX10:51 pmPortland
$898
British Airways
May 27
PDX7:30 pmPortland
31h 55m
1 stop
SOF1:25 pmSofia
Jun 3
SOF9:25 pmSofia
36h 31m
2 stops
PDX11:56 pmPortland
$989

United Airlines flights from Portland to Sofia

Our best United Airlines deals on Portland to Sofia flight tickets
United Airlines
May 7
PDX7:45 pmPortland
41h 30m
2 stops
SOF11:15 pmSofia
May 14
SOF6:10 amSofia
26h 49m
2 stops
PDX10:59 pmPortland
$949
United Airlines
Aug 27
PDX12:50 pmPortland
23h 50m
3 stops
SOF10:40 pmSofia
Sep 2
SOF8:00 amSofia
22h 20m
2 stops
PDX8:20 pmPortland
$1,105
United Airlines
Jul 1
PDX5:00 amPortland
27h 05m
2 stops
SOF6:05 pmSofia
Jul 15
SOF6:10 amSofia
26h 53m
2 stops
PDX11:03 pmPortland
$1,163

momondo Fare Finder

 
Customize your flight search to find flights from Portland to Sofia that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated April 13, 2026.
Use the filters below to find and compare flights from Portland to Sofia that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

PortlandSofia

PDX - SOF

PDXSOF

Portland

Wed 5/20

7:30 pm-1:25 pm

1 stop31h 55m

Sofia

Wed 6/10

9:25 pm-5:40 pm

1 stop30h 15m

$855

PortlandSofia

PDX - SOF

PDXSOF

Portland

Thu 8/27

10:45 am-3:05 pm

2 stops18h 20m

Sofia

Wed 9/2

11:05 am-11:09 pm

2 stops22h 04m

$859

PortlandSofia

PDX - SOF

PDXSOF

Portland

Wed 5/20

7:30 pm-1:25 pm

1 stop31h 55m

Sofia

Wed 6/10

9:25 pm-10:51 pm

2 stops35h 26m

$898

PortlandSofia

PDX - SOF

PDXSOF

Portland

Thu 5/7

7:45 pm-11:15 pm

2 stops41h 30m

Sofia

Thu 5/14

6:10 am-10:59 pm

2 stops26h 49m

$949

PortlandSofia

PDX - SOF

PDXSOF

Portland

Thu 8/27

7:00 am-2:00 pm

2 stops21h 00m

Sofia

Wed 9/2

7:00 am-11:10 am

1 stop14h 10m

$969

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sun 5/17

9:20 am-2:00 pm

2 stops18h 40m

Sofia

Tue 5/26

7:00 am-11:10 am

1 stop14h 10m

$971

PortlandSofia

PDX - SOF

PDXSOF

Portland

Thu 5/7

7:00 am-8:15 pm

2 stops27h 15m

Sofia

Thu 5/14

9:05 pm-9:28 pm

2 stops34h 23m

$975

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sun 5/17

7:15 am-11:15 pm

2 stops30h 00m

Sofia

Tue 5/26

6:10 am-4:47 pm

2 stops20h 37m

$978
Quickest round-trip

PortlandSofia

PDX - SOF

PDXSOF

Portland

Thu 5/7

1:05 pm-2:00 pm

1 stop14h 55m

Sofia

Thu 5/14

7:00 am-11:10 am

1 stop14h 10m

$980

PortlandSofia

PDX - SOF

PDXSOF

Portland

Wed 5/27

7:30 pm-1:25 pm

1 stop31h 55m

Sofia

Wed 6/3

9:25 pm-11:56 pm

2 stops36h 31m

$989

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Sofia from

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

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

18h 10m

Direct flights

None
The fastest flight from Portland to Sofia takes 18h 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. 18h 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?

  • 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?

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
KLMPriceFrom $555Free CancellationRating
7.8
1,499 reviews
Search KLM flights
LufthansaPriceFrom $635Free CancellationRating
6.8
7,921 reviews
Search Lufthansa flights
United AirlinesPriceFrom $639Free CancellationRating
7.4
9,581 reviews
Search United Airlines flights

Traveling to a place near Sofia?

Book flights to Sofia if you plan to visit one of these locations
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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Fly your favorite airline to Sofia

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