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Cheap flights from Portland to Sofia from $329

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 5/27. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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.
United Airlines Logo
5:15 am - 11:00 pm
PDX
-
SOF
31h 45m
2 stops
United Airlines Logo
6:20 am - 12:53 am
SOF
-
PDX
52h 33m
3 stops
$607United Airlines
Fri, Aug 21 - Fri, Sep 4
United Airlines Logo
8:00 am - 6:40 pm
PDX
-
SOF
24h 40m
2 stops
United Airlines Logo
6:20 am - 11:04 pm
SOF
-
PDX
26h 44m
2 stops
$614United Airlines
Fri, Aug 21 - Fri, Sep 4
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
$636KLM
Fri, Aug 21 - Fri, Sep 4
United Airlines Logo
7:49 pm - 10:45 pm
PDX
-
SOF
40h 56m
2 stops
United Airlines Logo
1:45 pm - 9:58 pm
SOF
-
PDX
41h 13m
2 stops
$740United Airlines
Thu, Mar 5 - Mon, Mar 9
Scandinavian Airlines Logo
1:05 pm - 2:00 pm
PDX
-
SOF
14h 55m
1 stop
Scandinavian Airlines Logo
7:00 am - 11:10 am
SOF
-
PDX
14h 10m
1 stop
$763Scandinavian Airlines
Fri, Aug 21 - Fri, Sep 4
United Airlines Logo
7:30 am - 10:45 pm
PDX
-
SOF
29h 15m
2 stops
United Airlines Logo
1:45 pm - 10:45 pm
SOF
-
PDX
42h 00m
2 stops
$769United Airlines
Thu, Mar 5 - Mon, Mar 9
United Airlines Logo
5:30 am - 10:45 pm
PDX
-
SOF
31h 15m
2 stops
United Airlines Logo
1:45 pm - 10:45 pm
SOF
-
PDX
42h 00m
2 stops
$770United Airlines
Thu, Mar 5 - Mon, Mar 9
United Airlines Logo
1:30 pm - 10:45 pm
PDX
-
SOF
23h 15m
2 stops
United Airlines Logo
1:45 pm - 11:04 pm
SOF
-
PDX
42h 19m
2 stops
$797United Airlines
Thu, Mar 5 - Mon, Mar 9
SWISS Logo
1:39 pm - 10:15 am
PDX
-
SOF
34h 36m
2 stops
SWISS Logo
7:55 am - 7:14 pm
SOF
-
PDX
20h 19m
2 stops
$892SWISS
Fri, Mar 6 - Wed, Mar 25
KLM Logo
7:00 am - 2:05 pm
PDX
-
SOF
21h 05m
2 stops
KLM Logo
7:00 am - 12:25 pm
SOF
-
PDX
14h 25m
1 stop
$911KLM
Fri, Mar 6 - Wed, Mar 25

United Airlines flights from Portland to Sofia

Our best United Airlines deals on Portland to Sofia flight tickets
United Airlines
Aug 21
PDX5:15 amPortland
31h 45m
2 stops
SOF11:00 pmSofia
Sep 4
SOF6:20 amSofia
52h 33m
3 stops
PDX12:53 amPortland
$607
United Airlines
Aug 21
PDX8:00 amPortland
24h 40m
2 stops
SOF6:40 pmSofia
Sep 4
SOF6:20 amSofia
26h 44m
2 stops
PDX11:04 pmPortland
$614
United Airlines
Mar 5
PDX7:49 pmPortland
40h 56m
2 stops
SOF10:45 pmSofia
Mar 9
SOF1:45 pmSofia
41h 13m
2 stops
PDX9:58 pmPortland
$740

KLM flights from Portland to Sofia

Our best KLM deals on Portland to Sofia flight tickets
KLM
Aug 21
PDX7:00 amPortland
21h 00m
2 stops
SOF2:00 pmSofia
Sep 4
SOF7:00 amSofia
14h 10m
1 stop
PDX11:10 amPortland
$636
KLM
Mar 6
PDX7:00 amPortland
21h 05m
2 stops
SOF2:05 pmSofia
Mar 25
SOF7:00 amSofia
14h 25m
1 stop
PDX12:25 pmPortland
$911

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 February 23, 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

PortlandSofia

PDX - SOF

PDXSOF

Portland

Fri 8/21

5:15 am-11:00 pm

2 stops31h 45m

Sofia

Fri 9/4

6:20 am-12:53 am

3 stops52h 33m

$607

PortlandSofia

PDX - SOF

PDXSOF

Portland

Fri 8/21

8:00 am-6:40 pm

2 stops24h 40m

Sofia

Fri 9/4

6:20 am-11:04 pm

2 stops26h 44m

$614

PortlandSofia

PDX - SOF

PDXSOF

Portland

Fri 8/21

7:00 am-2:00 pm

2 stops21h 00m

Sofia

Fri 9/4

7:00 am-11:10 am

1 stop14h 10m

$636

PortlandSofia

PDX - SOF

PDXSOF

Portland

Thu 3/5

7:49 pm-10:45 pm

2 stops40h 56m

Sofia

Mon 3/9

1:45 pm-9:58 pm

2 stops41h 13m

$740

PortlandSofia

PDX - SOF

PDXSOF

Portland

Fri 8/21

1:05 pm-2:00 pm

1 stop14h 55m

Sofia

Fri 9/4

7:00 am-11:10 am

1 stop14h 10m

$763

PortlandSofia

PDX - SOF

PDXSOF

Portland

Thu 3/5

7:30 am-10:45 pm

2 stops29h 15m

Sofia

Mon 3/9

1:45 pm-10:45 pm

2 stops42h 00m

$769

PortlandSofia

PDX - SOF

PDXSOF

Portland

Thu 3/5

5:30 am-10:45 pm

2 stops31h 15m

Sofia

Mon 3/9

1:45 pm-10:45 pm

2 stops42h 00m

$770

PortlandSofia

PDX - SOF

PDXSOF

Portland

Thu 3/5

1:30 pm-10:45 pm

2 stops23h 15m

Sofia

Mon 3/9

1:45 pm-11:04 pm

2 stops42h 19m

$797

PortlandSofia

PDX - SOF

PDXSOF

Portland

Fri 3/6

1:39 pm-10:15 am

2 stops34h 36m

Sofia

Wed 3/25

7:55 am-7:14 pm

2 stops20h 19m

$892

PortlandSofia

PDX - SOF

PDXSOF

Portland

Fri 3/6

7:00 am-2:05 pm

2 stops21h 05m

Sofia

Wed 3/25

7:00 am-12:25 pm

1 stop14h 25m

$911

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
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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 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

29h 15m

Direct flights

None
The fastest flight from Portland to Sofia takes 29h 15m
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. 29h 15m 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
7.7
1,458 reviews
Search KLM flights
LufthansaPriceFrom $635Free CancellationRating
6.8
7,803 reviews
Search Lufthansa flights
United AirlinesPriceFrom $639Free CancellationRating
7.4
9,342 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