Cheap flights from Portland to Sofia from $345

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 9/25. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

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

Trusted and free

Trusted and free

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

Price Alerts

Price Alerts

Not ready to book? to track prices.

Find the cheapest flights from Portland to Sofia

Cheap round-trip flights

 Logo
7:00 pm - 1:50 pmPDX-SOF
33h 50m2 stops
 Logo
6:00 am - 9:15 amSOF-PDX
37h 15m3 stops
Tue, Oct 28 - Tue, Nov 4
 Logo
7:00 pm - 1:50 pmPDX-SOF
33h 50m2 stops
 Logo
6:00 am - 6:36 pmSOF-PDX
22h 36m2 stops
Tue, Oct 28 - Tue, Nov 4
United Airlines Logo
6:00 am - 10:45 pmPDX-SOF
31h 45m2 stops
United Airlines Logo
6:10 am - 12:26 amSOF-PDX
28h 16m3 stops
$565United Airlines
Find Deal
Mon, Oct 27 - Wed, Nov 5
 Logo
9:58 am - 2:05 pmPDX-SOF
19h 07m2 stops
 Logo
7:00 am - 11:25 amSOF-PDX
14h 25m1 stop
Mon, Oct 27 - Wed, Nov 5
KLM Logo
2:25 pm - 2:05 pmPDX-SOF
14h 40m1 stop
KLM Logo
7:00 am - 11:25 amSOF-PDX
14h 25m1 stop
$605KLM
Find Deal
Mon, Oct 27 - Wed, Nov 5
Lufthansa Logo
3:41 pm - 10:45 pmPDX-SOF
22h 04m2 stops
Lufthansa Logo
7:05 pm - 8:49 pmSOF-PDX
34h 44m2 stops
$629Lufthansa
Find Deal
Thu, Mar 12 - Mon, Mar 16
United Airlines Logo
3:41 pm - 10:45 pmPDX-SOF
22h 04m2 stops
United Airlines Logo
1:55 pm - 8:49 pmSOF-PDX
39h 54m2 stops
$633United Airlines
Find Deal
Thu, Mar 12 - Mon, Mar 16
Air Canada Logo
9:50 am - 6:15 pmPDX-SOF
23h 25m3 stops
Air Canada Logo
6:00 am - 9:15 amSOF-PDX
37h 15m3 stops
$820Air Canada
Find Deal
Tue, Oct 28 - Tue, Nov 4
KLM Logo
7:00 am - 2:05 pmPDX-SOF
22h 05m2 stops
KLM Logo
7:00 am - 12:25 pmSOF-PDX
14h 25m1 stop
$1,121KLM
Find Deal
Thu, Mar 12 - Mon, Mar 16
Air Canada Logo
9:50 am - 6:20 pmPDX-SOF
22h 30m3 stops
Air Canada Logo
6:00 am - 9:15 amSOF-PDX
37h 15m3 stops
$1,357Air Canada
Find Deal
Sat, Dec 6 - Thu, Dec 11

Air Canada flights from Portland to Sofia

Our best Air Canada deals on Portland to Sofia flight tickets
Air Canada
Oct 28
PDX9:50 amPortland
23h 25m
3 stops
SOF6:15 pmSofia
Nov 4
SOF6:00 amSofia
37h 15m
3 stops
PDX9:15 amPortland
Air Canada
Dec 6
PDX9:50 amPortland
22h 30m
3 stops
SOF6:20 pmSofia
Dec 11
SOF6:00 amSofia
37h 15m
3 stops
PDX9:15 amPortland

United Airlines flights from Portland to Sofia

Our best United Airlines deals on Portland to Sofia flight tickets
United Airlines
Oct 27
PDX6:00 amPortland
31h 45m
2 stops
SOF10:45 pmSofia
Nov 5
SOF6:10 amSofia
28h 16m
3 stops
PDX12:26 amPortland
United Airlines
Mar 12
PDX3:41 pmPortland
22h 04m
2 stops
SOF10:45 pmSofia
Mar 16
SOF1:55 pmSofia
39h 54m
2 stops
PDX8:49 pmPortland
United Airlines
Mar 12
PDX7:30 pmPortland
18h 15m
2 stops
SOF10:45 pmSofia
Mar 16
SOF1:55 pmSofia
54h 54m
3 stops
PDX11:49 amPortland

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 September 15, 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

Tue 10/28

7:00 pm-1:50 pm

2 stops33h 50m

Sofia

Tue 11/4

6:00 am-9:15 am

3 stops37h 15m

$555

PortlandSofia

PDX - SOF

PDXSOF

Portland

Tue 10/28

7:00 pm-1:50 pm

2 stops33h 50m

Sofia

Tue 11/4

6:00 am-6:36 pm

2 stops22h 36m

$561

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 10/27

6:00 am-10:45 pm

2 stops31h 45m

Sofia

Wed 11/5

6:10 am-12:26 am

3 stops28h 16m

$565

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 10/27

9:58 am-2:05 pm

2 stops19h 07m

Sofia

Wed 11/5

7:00 am-11:25 am

1 stop14h 25m

$584

PortlandSofia

PDX - SOF

PDXSOF

Portland

Mon 10/27

2:25 pm-2:05 pm

1 stop14h 40m

Sofia

Wed 11/5

7:00 am-11:25 am

1 stop14h 25m

$605

PortlandSofia

PDX - SOF

PDXSOF

Portland

Thu 3/12

3:41 pm-10:45 pm

2 stops22h 04m

Sofia

Mon 3/16

7:05 pm-8:49 pm

2 stops34h 44m

$629

PortlandSofia

PDX - SOF

PDXSOF

Portland

Thu 3/12

3:41 pm-10:45 pm

2 stops22h 04m

Sofia

Mon 3/16

1:55 pm-8:49 pm

2 stops39h 54m

$633

PortlandSofia

PDX - SOF

PDXSOF

Portland

Tue 10/28

9:50 am-6:15 pm

3 stops23h 25m

Sofia

Tue 11/4

6:00 am-9:15 am

3 stops37h 15m

$820

PortlandSofia

PDX - SOF

PDXSOF

Portland

Thu 3/12

7:00 am-2:05 pm

2 stops22h 05m

Sofia

Mon 3/16

7:00 am-12:25 pm

1 stop14h 25m

$1,121

PortlandSofia

PDX - SOF

PDXSOF

Portland

Sat 12/6

9:50 am-6:20 pm

3 stops22h 30m

Sofia

Thu 12/11

6:00 am-9:15 am

3 stops37h 15m

$1,357

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 13 resultsSorted by cheapest first
1
2

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 $761.

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.
  • 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 $635Free CancellationRating
6.8
7,409 reviews
Search Lufthansa flights
United AirlinesPriceFrom $639Free CancellationRating
7.4
8,931 reviews
Search United Airlines flights
Air CanadaPriceFrom $678Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
KLMPriceFrom $692Free CancellationRating
7.8
1,385 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.

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.
1 adult
Wed 10/15
Wed 10/22

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