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Cheap flights from Portland to Sofia from $543

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 1/21. 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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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
1:24 pm - 6:20 pmPDX-SOF
18h 56m3 stops
United Airlines Logo
6:10 am - 10:32 pmSOF-PDX
26h 22m2 stops
$543United Airlines
Find Deal
Wed, Jan 21 - Sun, Jan 25
United Airlines Logo
1:24 pm - 10:45 pmPDX-SOF
23h 21m3 stops
United Airlines Logo
2:00 pm - 12:39 amSOF-PDX
20h 39m2 stops
$547United Airlines
Find Deal
Wed, Jan 21 - Sun, Jan 25
KLM Logo
1:25 pm - 2:05 pmPDX-SOF
14h 40m1 stop
KLM Logo
7:00 am - 11:25 amSOF-PDX
14h 25m1 stop
$590KLM
Find Deal
Wed, Jan 21 - Sun, Jan 25
KLM Logo
1:25 pm - 2:05 pmPDX-SOF
14h 40m1 stop
KLM Logo
7:00 am - 11:25 amSOF-PDX
14h 25m1 stop
$591KLM
Find Deal
Wed, Jan 21 - Sun, Jan 25
KLM Logo
7:00 am - 2:05 pmPDX-SOF
21h 05m2 stops
KLM Logo
7:00 am - 11:25 amSOF-PDX
14h 25m1 stop
$595KLM
Find Deal
Wed, Jan 21 - Sun, Jan 25
United Airlines Logo
11:55 pm - 10:45 pmPDX-SOF
36h 50m2 stops
United Airlines Logo
6:05 am - 6:56 pmSOF-PDX
22h 51m2 stops
$736United Airlines
Find Deal
Sun, Jan 4 - Sat, Jan 31
Lufthansa Logo
7:49 pm - 10:45 pmPDX-SOF
17h 56m2 stops
Lufthansa Logo
7:05 pm - 12:44 amSOF-PDX
38h 39m2 stops
$907Lufthansa
Find Deal
Thu, Mar 12 - Mon, Mar 16
United Airlines Logo
7:30 am - 10:45 pmPDX-SOF
29h 15m2 stops
United Airlines Logo
2:00 pm - 12:18 pmSOF-PDX
56h 18m3 stops
$913United Airlines
Find Deal
Sat, Jan 3 - Sat, Jan 10
United Airlines Logo
1:00 pm - 10:45 pmPDX-SOF
24h 45m3 stops
United Airlines Logo
1:45 pm - 9:10 pmSOF-PDX
40h 25m2 stops
$920United Airlines
Find Deal
Thu, Mar 12 - Mon, Mar 16
United Airlines Logo
7:00 am - 11:50 amPDX-SOF
42h 50m3 stops
United Airlines Logo
6:10 am - 12:18 pmSOF-PDX
40h 08m3 stops
$945United Airlines
Find Deal
Tue, Dec 23 - Sun, Jan 11

United Airlines flights from Portland to Sofia

Our best United Airlines deals on Portland to Sofia flight tickets
United Airlines
Jan 21
PDX1:24 pmPortland
18h 56m
3 stops
SOF6:20 pmSofia
Jan 25
SOF6:10 amSofia
26h 22m
2 stops
PDX10:32 pmPortland
$543
Find similar
United Airlines
Jan 21
PDX1:24 pmPortland
23h 21m
3 stops
SOF10:45 pmSofia
Jan 25
SOF2:00 pmSofia
20h 39m
2 stops
PDX12:39 amPortland
$547
Find similar
United Airlines
Jan 3
PDX7:30 amPortland
29h 15m
2 stops
SOF10:45 pmSofia
Jan 10
SOF2:00 pmSofia
56h 18m
3 stops
PDX12:18 pmPortland
$913
Find similar

KLM flights from Portland to Sofia

Our best KLM deals on Portland to Sofia flight tickets
KLM
Jan 21
PDX1:25 pmPortland
14h 40m
1 stop
SOF2:05 pmSofia
Jan 25
SOF7:00 amSofia
14h 25m
1 stop
PDX11:25 amPortland
$590
Find similar
KLM
Jan 21
PDX1:25 pmPortland
14h 40m
1 stop
SOF2:05 pmSofia
Jan 25
SOF7:00 amSofia
14h 25m
1 stop
PDX11:25 amPortland
$591
Find similar
KLM
Jan 21
PDX7:00 amPortland
21h 05m
2 stops
SOF2:05 pmSofia
Jan 25
SOF7:00 amSofia
14h 25m
1 stop
PDX11:25 amPortland
$595
Find similar

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 November 20, 2025.
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

Wed 1/21

1:24 pm-6:20 pm

3 stops18h 56m

Sofia

Sun 1/25

6:10 am-10:32 pm

2 stops26h 22m

$543

PortlandSofia

PDX - SOF

PDXSOF

Portland

Wed 1/21

1:24 pm-10:45 pm

3 stops23h 21m

Sofia

Sun 1/25

2:00 pm-12:39 am

2 stops20h 39m

$547

PortlandSofia

PDX - SOF

PDXSOF

Portland

Wed 1/21

1:25 pm-2:05 pm

1 stop14h 40m

Sofia

Sun 1/25

7:00 am-11:25 am

1 stop14h 25m

$590

PortlandSofia

PDX - SOF

PDXSOF

Portland

Wed 1/21

1:25 pm-2:05 pm

1 stop14h 40m

Sofia

Sun 1/25

7:00 am-11:25 am

1 stop14h 25m

$591

PortlandSofia

PDX - SOF

PDXSOF

Portland

Wed 1/21

7:00 am-2:05 pm

2 stops21h 05m

Sofia

Sun 1/25

7:00 am-11:25 am

1 stop14h 25m

$595

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sun 1/4

11:55 pm-10:45 pm

2 stops36h 50m

Sofia

Sat 1/31

6:05 am-6:56 pm

2 stops22h 51m

$736

PortlandSofia

PDX - SOF

PDXSOF

Portland

Thu 3/12

7:49 pm-10:45 pm

2 stops17h 56m

Sofia

Mon 3/16

7:05 pm-12:44 am

2 stops38h 39m

$907

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sat 1/3

7:30 am-10:45 pm

2 stops29h 15m

Sofia

Sat 1/10

2:00 pm-12:18 pm

3 stops56h 18m

$913

PortlandSofia

PDX - SOF

PDXSOF

Portland

Thu 3/12

1:00 pm-10:45 pm

3 stops24h 45m

Sofia

Mon 3/16

1:45 pm-9:10 pm

2 stops40h 25m

$920

PortlandSofia

PDX - SOF

PDXSOF

Portland

Tue 12/23

7:00 am-11:50 am

3 stops42h 50m

Sofia

Sun 1/11

6:10 am-12:18 pm

3 stops40h 08m

$945

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 cheapest month to fly to Sofia?

The cheapest month to fly to Sofia from Portland is in November. Flight prices, which tend to average around $682, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of November, then book flights to Sofia from Portland during October instead. Flights to Sofia in October, while not as cheap as those in November, still average around $748.

What is the cheapest day to depart on your flight to Sofia?

According to our data, Tuesday is the cheapest day to fly to Sofia from Portland. The lowest ticket price found for a Tuesday departure recently was $956. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. Flights from Portland to Sofia on a Saturday will generally be more expensive and average around $1,199. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to Sofia?

At noon is the cheapest time of day to fly from Portland to Sofia when you can find flight prices for as low as $1,012. Flying to Sofia at noon is an ideal time because this is during off-peak travel hours. In the morning is when there is more demand to fly to Sofia, so prices are often more expensive at around $1,171 per ticket.

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

Direct flights

None
There are no direct flights from Portland to Sofia. There are no popular flight routes from Portland to Sofia.
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  • How far is Portland to Sofia by plane?

    A flight from Portland to Sofia will travel around 5988.5 mi. 14h 40m 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
LufthansaPriceFrom $638Free CancellationRating
6.8
7,579 reviews
Search Lufthansa flights
United AirlinesPriceFrom $639Free CancellationRating
7.4
9,028 reviews
Search United Airlines flights
Air CanadaPriceFrom $678Free CancellationRating
7.1
10,463 reviews
Search Air Canada flights
KLMPriceFrom $692Free CancellationRating
7.7
1,414 reviews
Search KLM 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
Air Canada