Cheap flights from Portland to Portugal 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 Portugal departing on 2/8. 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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Fly from
Fly to
Route
Depart
Return
PortlandPorto
PDX Portland - OPO Porto
PDXOPO
Portland
Tue 3/2
1:39 pm-6:30 pm
2 stops20h 51m
Porto
Tue 3/16
7:20 pm-11:07 pm
2 stops34h 47m
PortlandLisbon
PDX Portland - LIS Lisbon Humberto Delgado
PDXLIS
Portland
Sat 12/5
7:10 am-8:00 am
1 stop16h 50m
Lisbon Humberto Delgado
Sat 12/12
10:00 am-10:18 pm
1 stop20h 18m
PortlandLisbon
PDX Portland - LIS Lisbon Humberto Delgado
PDXLIS
Portland
Sat 12/5
7:10 am-8:00 am
1 stop16h 50m
Lisbon Humberto Delgado
Sun 12/13
10:00 am-10:18 pm
1 stop20h 18m
PortlandPorto
PDX Portland - OPO Porto
PDXOPO
Portland
Sun 2/21
1:20 pm-10:30 pm
1 stop25h 10m
Porto
Wed 2/24
5:00 am-11:20 am
1 stop14h 20m
PortlandPorto
PDX Portland - OPO Porto
PDXOPO
Portland
Mon 2/22
1:20 pm-10:30 pm
1 stop25h 10m
Porto
Tue 3/2
11:15 am-11:20 am
1 stop32h 05m
PortlandPorto
PDX Portland - OPO Porto
PDXOPO
Portland
Mon 2/22
1:20 pm-3:25 pm
1 stop18h 05m
Porto
Fri 2/26
5:00 am-11:20 am
1 stop14h 20m
PortlandPorto
PDX Portland - OPO Porto
PDXOPO
Portland
Mon 2/22
7:00 am-9:30 am
2 stops18h 30m
Porto
Wed 2/24
12:35 pm-11:25 pm
2 stops18h 50m
PortlandPorto
PDX Portland - OPO Porto
PDXOPO
Portland
Wed 2/24
5:15 am-9:30 am
2 stops20h 15m
Porto
Tue 3/2
6:00 am-8:33 pm
2 stops22h 33m
PortlandLisbon
PDX Portland - LIS Lisbon Humberto Delgado
PDXLIS
Portland
Sat 3/13
3:15 pm-6:55 am
2 stops31h 40m
Lisbon Humberto Delgado
Thu 3/25
8:55 am-7:17 pm
2 stops41h 22m
PortlandLisbon
PDX Portland - LIS Lisbon Humberto Delgado
PDXLIS
Portland
Sun 2/14
3:15 pm-10:40 am
2 stops35h 25m
Lisbon Humberto Delgado
Fri 2/19
10:55 am-7:17 pm
2 stops40h 22m
See travel insights to Portugal from
How to get the cheapest flight ticket from Portland to Portugal
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 Portugal?
The cheapest month to fly to Portugal from Portland is in December. Flight prices, which tend to average around $583, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of December, then book flights to Portugal from Portland during February instead. Flights to Portugal in February, while not as cheap as those in December, still average around $618.
How far in advance should I book a flight from Portland to Portugal?
You are more likely to see cheaper flights to Portugal from Portland when booking weeks ahead of your departure date. In general, you can expect to find flights to Portugal for around $885 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Portugal from Portland for as low as $745 on momondo.
What is the cheapest airline that flies from Portland to Portugal?
United Airlines, Delta, and Air Canada are the most popular carriers operating from Portland to Portugal
What airlines fly to Portugal?
British Airways, KLM and Delta are the top three most popular airlines that fly to Portugal from Portland according to our data. British Airways is the first choice among our users, with 37% of people opting to fly with this airline when traveling to Portugal. Keep in mind that there are 8 different airlines that fly to Portugal on a routine basis, so you have a few additional options to choose from.
Cheap Portland to Portugal flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Portland to Portugal
Frequently asked questions about flying from Portland to Portugal
When did momondo last update prices for flights from Portland Airport to Portugal?
Prices for flights from Portland Airport to Portugal are refreshed on a daily basis.
How many operators does momondo search for flights from Portland Airport to Portugal?
As of October 2026, there are 8 operators available to choose from for flights from Portland Airport to Portugal.
How old do you have to be to fly from Portland Airport to Portugal?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Portland Airport to Portugal.
What documentation or ID do you need to fly to Portugal?
The travel and health documents required for your trip to Portugal 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 Portugal. We always recommend checking with your airline or a trusted third party such as IATA to get advice.
Best airlines flying from Portland to Portugal
Compare and see reviews for airlines that fly from Portland to Portugal with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $318 | Free Cancellation | Rating 7.5 694 reviews | |||
| PriceFrom $360 | Free Cancellation | Rating 6.9 758 reviews | |||
| PriceFrom $492 | Free Cancellation | Rating 7.8 1,580 reviews | |||
| PriceFrom $492 | Free Cancellation | Rating 7.8 8,651 reviews | |||
| PriceFrom $501 | Free Cancellation | Rating 6.8 8,269 reviews | |||
| PriceFrom $502 | Free Cancellation | Rating 7.4 10,331 reviews | |||
| PriceFrom $508 | Free Cancellation | Rating 6.7 8,255 reviews | |||
| PriceFrom $576 | Free Cancellation | Rating 7.1 11,748 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from Portland to Portugal?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Portland to Portugal. momondo saves you time and could save you money on your trip.
Can I find flights from Portland to Portugal with flexible booking policies on momondo?
All flight searches from Portland to Portugal on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from Portland to Portugal?
Once all potential Portland to Portugal flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from Portland to Portugal right now. Can momondo alert me if prices change?
If you are not ready to book a flight from Portland to Portugal now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Portugal and let you know when they change.