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Cheap flights from Oregon to Porto from $349

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Oregon to Porto departing on 12/5. 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 Oregon to Porto

Cheap round-trip flights

Enter your travel dates to find the best prices.
Multiple Airlines Logo
7:00 am - 10:30 amPDX-OPO
19h 30m2 stops
Multiple Airlines Logo
11:15 am - 11:25 amOPO-PDX
32h 10m1 stop
$481Multiple Airlines
Find Deal
Mon, Jan 12 - Tue, Jan 20
Lufthansa Logo
1:08 pm - 1:15 pmEUG-OPO
40h 07m2 stops
Lufthansa Logo
6:00 am - 9:30 pmOPO-EUG
23h 30m2 stops
$490Lufthansa
Find Deal
Tue, Dec 2 - Tue, Dec 9
Multiple Airlines Logo
7:45 pm - 11:40 pmPDX-OPO
43h 55m2 stops
Multiple Airlines Logo
1:45 pm - 6:30 pmOPO-PDX
36h 45m2 stops
$490Multiple Airlines
Find Deal
Wed, Dec 31 - Mon, Feb 2
KLM Logo
1:25 pm - 10:25 pmPDX-OPO
25h 00m1 stop
KLM Logo
6:00 am - 10:15 pmOPO-PDX
24h 15m2 stops
$492KLM
Find Deal
Wed, Dec 31 - Wed, Jan 21
Delta Logo
6:50 am - 10:25 amPDX-OPO
43h 35m2 stops
Delta Logo
11:15 am - 12:32 pmOPO-PDX
57h 17m2 stops
$493Delta
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Wed, Dec 31 - Mon, Jan 12
United Airlines Logo
7:30 am - 2:45 pmPDX-OPO
23h 15m2 stops
United Airlines Logo
12:30 pm - 12:12 pmOPO-PDX
31h 42m3 stops
$502United Airlines
Find Deal
Tue, Dec 2 - Mon, Dec 8
United Airlines Logo
6:47 pm - 11:40 amEUG-OPO
32h 53m3 stops
United Airlines Logo
6:00 am - 10:59 pmOPO-EUG
24h 59m2 stops
$503United Airlines
Find Deal
Tue, Dec 2 - Tue, Dec 9
American Airlines Logo
12:59 am - 7:40 amPDX-OPO
22h 41m2 stops
American Airlines Logo
8:40 pm - 12:59 pmOPO-PDX
24h 19m2 stops
$509American Airlines
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Mon, Dec 1 - Mon, Dec 8
Delta Logo
5:25 pm - 10:30 amPDX-OPO
57h 05m2 stops
Delta Logo
11:15 am - 8:27 pmOPO-PDX
41h 12m2 stops
$548Delta
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Sun, Dec 28 - Mon, Jan 12
KLM Logo
7:00 am - 10:30 amPDX-OPO
19h 30m2 stops
KLM Logo
11:15 am - 11:25 amOPO-PDX
32h 10m1 stop
$587KLM
Find Deal
Thu, Feb 26 - Sat, Mar 7

United Airlines flights from Oregon to Porto

Our best United Airlines deals on Oregon to Porto flight tickets
United Airlines
Dec 2
PDX7:30 amPortland
23h 15m
2 stops
OPO2:45 pmPorto
Dec 8
OPO12:30 pmPorto
31h 42m
3 stops
PDX12:12 pmPortland
$502
Find similar
United Airlines
Dec 2
EUG6:47 pmEugene
32h 53m
3 stops
OPO11:40 amPorto
Dec 9
OPO6:00 amPorto
24h 59m
2 stops
EUG10:59 pmEugene
$503
Find similar
United Airlines
Jan 19
PDX7:00 amPortland
23h 55m
2 stops
OPO2:55 pmPorto
Feb 16
OPO12:30 pmPorto
56h 08m
3 stops
PDX12:38 pmPortland
$522
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Lufthansa flights from Oregon to Porto

Our best Lufthansa deals on Oregon to Porto flight tickets
Lufthansa
Dec 2
EUG1:08 pmEugene
40h 07m
2 stops
OPO1:15 pmPorto
Dec 9
OPO6:00 amPorto
23h 30m
2 stops
EUG9:30 pmEugene
$490
Find similar
Lufthansa
Feb 26
PDX3:50 pmPortland
23h 50m
2 stops
OPO11:40 pmPorto
Mar 7
OPO6:00 amPorto
22h 49m
2 stops
PDX8:49 pmPortland
$580
Find similar
Lufthansa
Dec 3
PDX10:10 amPortland
29h 30m
2 stops
OPO11:40 pmPorto
Dec 16
OPO4:15 pmPorto
40h 26m
2 stops
PDX12:41 amPortland
$596
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Oregon to Porto 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 5, 2025.
Use the filters below to find and compare flights from Oregon to Porto that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 1/12

7:00 am-10:30 am

2 stops19h 30m

Porto

Tue 1/20

11:15 am-11:25 am

1 stop32h 10m

$481

EugenePorto

EUG - OPO

EUGOPO

Eugene

Tue 12/2

1:08 pm-1:15 pm

2 stops40h 07m

Porto

Tue 12/9

6:00 am-9:30 pm

2 stops23h 30m

$490

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 12/31

7:45 pm-11:40 pm

2 stops43h 55m

Porto

Mon 2/2

1:45 pm-6:30 pm

2 stops36h 45m

$490

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 12/31

1:25 pm-10:25 pm

1 stop25h 00m

Porto

Wed 1/21

6:00 am-10:15 pm

2 stops24h 15m

$492

PortlandPorto

PDX - OPO

PDXOPO

Portland

Wed 12/31

6:50 am-10:25 am

2 stops43h 35m

Porto

Mon 1/12

11:15 am-12:32 pm

2 stops57h 17m

$493

PortlandPorto

PDX - OPO

PDXOPO

Portland

Tue 12/2

7:30 am-2:45 pm

2 stops23h 15m

Porto

Mon 12/8

12:30 pm-12:12 pm

3 stops31h 42m

$502

EugenePorto

EUG - OPO

EUGOPO

Eugene

Tue 12/2

6:47 pm-11:40 am

3 stops32h 53m

Porto

Tue 12/9

6:00 am-10:59 pm

2 stops24h 59m

$503

PortlandPorto

PDX - OPO

PDXOPO

Portland

Mon 12/1

12:59 am-7:40 am

2 stops22h 41m

Porto

Mon 12/8

8:40 pm-12:59 pm

2 stops24h 19m

$509

PortlandPorto

PDX - OPO

PDXOPO

Portland

Sun 12/28

5:25 pm-10:30 am

2 stops57h 05m

Porto

Mon 1/12

11:15 am-8:27 pm

2 stops41h 12m

$548

PortlandPorto

PDX - OPO

PDXOPO

Portland

Thu 2/26

7:00 am-10:30 am

2 stops19h 30m

Porto

Sat 3/7

11:15 am-11:25 am

1 stop32h 10m

$587

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Porto from

How to get the cheapest flight ticket from Oregon to Porto

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 Porto?

The month of November is, on average, the cheapest month to fly to Porto from Oregon, with most prices found around $690. If you aren’t able to travel during the month of November, then book flights to Porto from Oregon during December instead. Flights to Porto in December, while not as cheap as those in November, still average around $736.

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

The cheapest day to depart on your flight to Porto is on a Monday when prices can be found for as low as $1,088. This is often the case because there is less demand to fly during this day of the week. If your travel schedule is flexible, try to avoid departing on a Wednesday because tickets tend to average around $1,428. These prices are subject to change though, so be sure to set up a Price Alert for flights to Porto.

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

At noon is the cheapest time of day to fly from Oregon to Porto when you can find flight prices for as low as $1,088. Flying to Porto at noon is an ideal time because this is during off-peak travel hours. If you have a flexible travel schedule, then try to avoid flying in the morning when prices are $1,278 on average. Flights to Porto from Oregon in the morning are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight to Porto?

You are more likely to see cheaper flights to Porto from Oregon when booking weeks ahead of your departure date. In general, you can expect to find flights to Porto for around $1,025 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Porto from Oregon for as low as $709 on momondo.

Can stopping save me money on Oregon to Porto flights?

You could potentially save up to 7% on your flight if you consider stops on a Oregon to Porto flight.

Cheap Oregon to Porto flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Oregon to Porto

Direct flights

None
There are no direct flights from Oregon to Porto. There are no popular flight routes from Oregon to Porto.
Search flight deals

  • When did momondo last update prices for flights from Oregon to Porto Airport?

    Prices for flights from Oregon to Porto Airport are refreshed on a daily basis.

  • How many operators does momondo search for flights from Oregon to Porto Airport?

  • How old do you have to be to fly from Oregon to Porto Airport?

    The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Oregon to Porto Airport.

  • What documentation or ID do you need to fly to Porto Airport?

    The travel and health documents you'll need for your trip to Porto Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Porto Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Oregon to Porto

Compare and see reviews for airlines that fly from Oregon to Porto with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $647Free CancellationRating
7.4
9,000 reviews
Search United Airlines flights
KLMPriceFrom $647Free CancellationRating
7.7
1,405 reviews
Search KLM flights
DeltaPriceFrom $709Free CancellationRating
7.9
8,004 reviews
Search Delta flights

Traveling to a place near Porto?

Book flights to Porto if you plan to visit one of these locations
Vila Nova de Gaia
Coimbra
Aveiro
Matosinhos
Braga
Lamego
Guimarães
Esposende
Chaves
Espinho
Viseu
Ponte de Lima
Arcos de Valdevez
Pinhao
Curia
Penafiel
Mesao Frio
Mira
Baiao

Why use momondo?

Why should I use momondo to find a flight deal from Oregon to Porto?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Oregon to Porto. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Oregon to Porto with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Oregon to Porto flights to just show those with flexible booking policies.

How can momondo help me find flights from Oregon to Porto?

Once you have performed a search for Oregon to Porto flights, momondo helps you find the right one by offering useful filters to narrow down your flight selection. Flights can be filtered by multiple factors such as airline, airport and price; but also by other criteria like aircraft type and payment method.

I’m not ready to book a flight from Oregon to Porto right now. Can momondo alert me if prices change?

Price alerts on flights to Porto from Oregon 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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