Award flights from Seattle (SEA) to Porto (OPO)
Search flights from Seattle (SEA) to Porto (OPO)
Search live to see every flight, program and cabin price for your dates.
In the last 30 days AwardTool saw award space on 10 programs for SEA→OPO. Lowest economy: 22,500 miles + $35.40 (American Airlines AAdvantage). Lowest business class: 57,500 miles + $763.10 (American Airlines AAdvantage). Lowest first class: 186,100 miles + $11.20 (United MileagePlus).
Prices observed – ; newest observation .
Page regenerated from the Oct 19, 2026 data snapshot (normally daily). Summary last changed . Seats change quickly.
Seattle (SEA) to Porto (OPO) at a glance
- From
- Seattle-Tacoma International, Seattle, Washington, United States (SEA)
- To
- Francisco de Sa Carneiro Airport, Porto, Portugal (OPO)
- Programs with award space seen
- 10 of 10 programs tracked on this route
- Nonstop award space seen
- Yes, in economy, via Lufthansa Miles & More
- Airlines seen on these awards
- Eurowings Discover (4Y), American Airlines (AA), Air Canada (AC), Air France (AF), Alaska Airlines (AS), Royal Air Maroc (AT), British Airways (BA), Delta Air Lines (DL), Aer Lingus (EI), Air Dolomiti (EN), Eurowings (EW), IBERIA (IB) and 11 more
- Departures with open awards
- Oct 2026 to Jul 2027
- Most dates with space
- 59 of 59 departure dates checked (United MileagePlus, economy)
- Latest departure with space
- Observation window
- Awards observed in the last 30 days
- Destination guide
- Award flights to Porto (OPO)
Compare programs by cabin
The lowest one-way award each program showed in each cabin, sorted by points.
Economy
| Program | Points + taxes | Stops | Airlines seen | Seats | Dates seen | Newest observation | |
|---|---|---|---|---|---|---|---|
| Lufthansa Miles & MoreLowest observed | 3,642 pts + $326.10 | 1 stopNonstop from 3,642 pts | Eurowings Discover (4Y), Lufthansa (LH), Turkish Airlines (TK), United Airlines (UA) | 9+ | 39 | See dates | |
| GOL Smiles | 9,500 pts + taxes not reported | 1 stop | American Airlines (AA), Air Canada (AC), Air France (AF), Alaska Airlines (AS) +4 more | 2 | 21 | See dates | |
| American Airlines AAdvantage | 22,500 pts + $35.40 | 1 stop | American Airlines (AA), Alaska Airlines (AS), Royal Air Maroc (AT), British Airways (BA) | — | 29 | See dates | |
| Air France/KLM Flying Blue | 25,000 pts + $152.60 | 1 stop | Air France (AF), Delta Air Lines (DL), KLM (KL), Air Europa (UX) +1 more | 9+ | 45 | See dates | |
| Delta SkyMiles | 26,600 pts + $5.60 | 1 stop | Air France (AF), Delta Air Lines (DL), KLM (KL) | 9+ | 49 | See dates | |
| Avianca LifeMiles | 39,000 pts + $58.00 | 2 stops | Lufthansa (LH), United Airlines (UA) | 9+ | 9 | See dates | |
| United MileagePlus | 40,000 pts + $5.60 | 2 stops | Air Canada (AC), Air Dolomiti (EN), Eurowings (EW), Lufthansa (LH) +7 more | 9+ | 59 | See dates | |
| Air Canada Aeroplan | 40,000 pts + $75.71 | 2 stops | Air Canada (AC), Eurowings (EW), Lufthansa (LH), SWISS (LX) +3 more | 9+ | 44 | See dates | |
| Qantas Frequent Flyer | 43,500 pts + $356.60 | 1 stop | American Airlines (AA), Air France (AF), Alaska Airlines (AS), British Airways (BA) | 1 | 14 | See dates | |
| Turkish Miles & Smiles | 55,000 pts + taxes not reported | 1 stop | Turkish Airlines (TK) | 1 | 45 | See dates |
Premium Economy
| Program | Points + taxes | Stops | Airlines seen | Seats | Dates seen | Newest observation | |
|---|---|---|---|---|---|---|---|
| American Airlines AAdvantageLowest observed | 40,000 pts + $35.40 | 2 stops | American Airlines (AA), Alaska Airlines (AS), Royal Air Maroc (AT), British Airways (BA) | — | 26 | See dates | |
| United MileagePlus | 55,000 pts + $22.40 | 2 stops | Lufthansa (LH), SWISS (LX), Brussels Airlines (SN), TAP Portugal (TP) +1 more | 9+ | 52 | See dates | |
| Air Canada Aeroplan | 70,591 pts + $51.61 | 2 stops | Air Canada (AC), Lufthansa (LH) | 9+ | 3 | See dates | |
| Delta SkyMiles | 75,000 pts + $5.60 | 1 stop | Air France (AF), Delta Air Lines (DL), KLM (KL) | 9+ | 37 | See dates | |
| Air France/KLM Flying Blue | 89,000 pts + $246.30 | 1 stop | Air France (AF), Delta Air Lines (DL), KLM (KL), Air Europa (UX) +1 more | 9+ | 38 | See dates | |
| Qantas Frequent Flyer | 102,300 pts + $1,646.10 | 2 stops | Air France (AF), British Airways (BA) | 1 | 4 | See dates | |
| GOL Smiles | 599,100 pts + taxes not reported | 1 stop | American Airlines (AA) | 1 | 2 | See dates |
Not seen in premium economy: Avianca LifeMiles, Lufthansa Miles & More and Turkish Miles & Smiles.
Business Class
| Program | Points + taxes | Stops | Airlines seen | Seats | Dates seen | Newest observation | |
|---|---|---|---|---|---|---|---|
| American Airlines AAdvantageLowest observed | 57,500 pts + $763.10 | 1 stop | American Airlines (AA), Alaska Airlines (AS), Royal Air Maroc (AT), British Airways (BA) | — | 27 | See dates | |
| United MileagePlus | 88,000 pts + $22.40Mixed cabin | 2 stops | Air Canada (AC), Aer Lingus (EI), Lufthansa (LH), SWISS (LX) +3 more | 2 | 59 | See dates | |
| Turkish Miles & Smiles | 90,000 pts + taxes not reported | 1 stop | Turkish Airlines (TK) | 1 | 45 | See dates | |
| Lufthansa Miles & More | 101,168 pts + $1,526.60 | 1 stop | Lufthansa (LH), TAP Portugal (TP) | 9+ | 31 | See dates | |
| Qantas Frequent Flyer | 108,000 pts + $1,533.60 | 1 stop | Air France (AF), British Airways (BA) | 1 | 4 | See dates | |
| Delta SkyMiles | 125,000 pts + $55.80Mixed cabin | 2 stops | Air France (AF), Delta Air Lines (DL), KLM (KL) | 7 | 15 | See dates | |
| Air France/KLM Flying Blue | 146,000 pts + $360.40 | 1 stop | Air France (AF), Delta Air Lines (DL), KLM (KL), Air Europa (UX) | 8 | 38 | See dates | |
| Air Canada Aeroplan | 266,224 pts + $128.61Mixed cabin | 2 stops | Air Canada (AC), Lufthansa (LH) | 2 | 8 | See dates |
Not seen in business class: Avianca LifeMiles and GOL Smiles.
First Class
| Program | Points + taxes | Stops | Airlines seen | Seats | Dates seen | Newest observation | |
|---|---|---|---|---|---|---|---|
| United MileagePlusLowest observed | 186,100 pts + $11.20 | 2 stops | United Airlines (UA) | 8 | 49 | See dates | |
| Delta SkyMiles | 376,000 pts + $24.50 | 2 stops | Air France (AF), Delta Air Lines (DL), KLM (KL) | 3 | 43 | See dates |
Not seen in first class: American Airlines AAdvantage, Air Canada Aeroplan, Avianca LifeMiles, GOL Smiles, Air France/KLM Flying Blue, Lufthansa Miles & More, Qantas Frequent Flyer and Turkish Miles & Smiles.
Not seen means AwardTool hasn't observed this cabin on this route in the last 30 days. It doesn't mean the airline has no seats. Dates seen counts departure dates with an open award in that cabin at any price; newest observation is the latest time AwardTool saw one of them. Seats is the count the program reported when we observed it; some programs report at most 9.
Observed award examples
| Departure | Cabin | Program | Points + taxes | Seats | Stops | Observed (UTC) | |
|---|---|---|---|---|---|---|---|
| Economy | Lufthansa Miles & More | 3,642 pts + $337.50 | 9+ | 1 stop | Check this date | ||
| Premium Economy | American Airlines AAdvantage | 40,000 pts + $35.40 | — | 2 stops | Check this date | ||
| Business | United MileagePlus | 88,000 pts + $81.80Mixed cabin | 4 | 2 stops | Check this date | ||
| Business | Qantas Frequent Flyer | 108,000 pts + $1,533.60 | 1 | 1 stop | Check this date | ||
| Business | Air France/KLM Flying Blue | 146,000 pts + $360.40 | 8 | 1 stop | Check this date | ||
| Business | Turkish Miles & Smiles | 175,000 pts + taxes not reported | 2 | 1 stop | Check this date | ||
| First | United MileagePlus | 200,000 pts + $5.60 | 7 | 2 stops | Check this date | ||
| First | Delta SkyMiles | 499,900 pts + $5.60 | 6 | 1 stop | Check this date |
Prices are one-way per traveler: the program's points or miles plus taxes and carrier fees in USD, as AwardTool observed them in the observation window. Award space changes constantly. A seat we saw may be gone, and space we haven't seen may exist. Always confirm with a live search before transferring points; most transfers can't be reversed.
Nonstop award space
- Economy: nonstop from 3,642 miles via Lufthansa Miles & More, which showed nonstop space on 2 dates.
Best months to fly from Seattle (SEA) to Porto (OPO) on points
| Month | Economy | Premium Economy | Business | First |
|---|---|---|---|---|
| 6,615 · Miles & More (3 dates) | 55,000 · MileagePlus (5 dates) | 88,000 · MileagePlus (5 dates)Mixed cabin | 200,000 · MileagePlus (5 dates) | |
| 3,642 · Miles & More (4 dates) | 40,000 · AAdvantage (2 dates) | 104,357 · Miles & More (2 dates) | 200,000 · MileagePlus (4 dates) | |
| 87,300 · MileagePlus (3 dates) | 269,800 · SkyMiles (3 dates) | 57,500 · AAdvantage (1 date) | 186,100 · MileagePlus (3 dates) | |
| 15,436 · Miles & More (3 dates) | 102,300 · Qantas (1 date) | 90,000 · Miles&Smiles (3 dates) | 406,000 · SkyMiles (2 dates) | |
| 6,615 · Miles & More (6 dates) | 55,000 · MileagePlus (7 dates) | 88,000 · MileagePlus (7 dates)Mixed cabin | 200,000 · MileagePlus (1 date) | |
| 8,644 · Miles & More (3 dates) | 40,000 · AAdvantage (2 dates) | 57,500 · AAdvantage (3 dates) | 200,000 · MileagePlus (14 dates) | |
| 8,644 · Miles & More (6 dates) | 40,000 · AAdvantage (6 dates) | 57,500 · AAdvantage (6 dates) | 395,000 · MileagePlus (6 dates) | |
| 7,056 · Miles & More (9 dates) | 40,000 · AAdvantage (9 dates) | 57,500 · AAdvantage (10 dates) | 395,000 · MileagePlus (9 dates) | |
| 44,000 · MileagePlus (2 dates) | 153,000 · AAdvantage (2 dates) | 175,000 · Miles&Smiles (2 dates) | 395,000 · MileagePlus (2 dates) | |
| 16,529 · Miles & More (5 dates) | 70,591 · Aeroplan (1 date) | 88,000 · MileagePlus (5 dates)Mixed cabin | 200,000 · MileagePlus (5 dates) |
Points that transfer to these programs
| Program | Amex | Bilt | Capital One | Chase | Citi | Wells Fargo |
|---|---|---|---|---|---|---|
| Air Canada Aeroplan | 1:1 · Instant | 1:1 · Instant | 1:1 · Instant | 1:1 · Instant | — | — |
| Air France/KLM Flying Blue | 1:1 · Instant | 1:1 · Instant | 1:1 · Instant | 1:1 · Instant | 1:1 · Instant | 1:1 · Instant |
| American Airlines AAdvantage | — | — | — | — | 1:1 · Instant | — |
| Avianca LifeMiles | 1:1 · Instant | 1:1 · Instant | 1:1 · Instant | — | 1:1 · Instant | 1:1 · Instant |
| Delta SkyMiles | 1:1 · Instant | — | — | — | — | — |
| Qantas Frequent Flyer | 1:1 · Instant | — | 1:1 · ~1-2 days | — | 1:1 · Instant | — |
| Turkish Miles & Smiles | — | 1:1 · Instant | 1:1 · Instant | — | 1:1 · ~1 day | — |
| United MileagePlus | — | 1:1 · Instant | — | 1:1 · Instant | — | — |
Check current transfer bonuses. Most transfers can't be reversed. No bank transfers to GOL Smiles and Lufthansa Miles & More.
Search, calendar and alerts from Seattle (SEA) to Porto (OPO)
Route calendar
Every departure date with open award seats on SEA→OPO for United MileagePlus and the other programs: a limited window on the free plan and 365 days with Pro.
Open the route calendarLive search
Search one date across programs to see current flights, seats and taxes before you transfer points.
Search Seattle (SEA) to Porto (OPO)How many miles you need from Seattle (SEA) to Porto (OPO)
- In economy, American Airlines AAdvantage had the lowest observed award, 22,500 miles + $35.40; see how many miles you need with American Airlines AAdvantage.
- In premium economy, American Airlines AAdvantage had the lowest observed award, 40,000 miles + $35.40; see how many miles you need with American Airlines AAdvantage.
- In business class, American Airlines AAdvantage had the lowest observed award, 57,500 miles + $763.10; see how many miles you need with American Airlines AAdvantage.
- In first class, United MileagePlus had the lowest observed award, 186,100 miles + $11.20; see how many miles you need with United MileagePlus.
Questions about award flights from Seattle (SEA) to Porto (OPO)
What's the lowest Seattle (SEA) to Porto (OPO) award price AwardTool has seen?
In economy, 22,500 miles + $35.40 with American Airlines AAdvantage. Seen Sep 25, 2026, 18:07 UTC for a Nov 3, 2026 departure. American Airlines AAdvantage showed economy award space on 29 departure dates at any price (newest observation Oct 18, 2026, 16:31 UTC). In business class, 57,500 miles + $763.10 with American Airlines AAdvantage. American Airlines AAdvantage showed business-class award space on 27 departure dates at any price (newest observation Oct 18, 2026, 16:31 UTC). Search live before transferring points.
Which loyalty programs had award space from Seattle (SEA) to Porto (OPO)?
10 programs in the last 30 days: American Airlines AAdvantage (economy 29 dates, premium economy 26 dates, business class 27 dates); Air Canada Aeroplan (economy 44 dates, premium economy 3 dates, business class 8 dates); Avianca LifeMiles (economy 9 dates); Delta SkyMiles (economy 49 dates, premium economy 37 dates, business class 15 dates, first class 43 dates); GOL Smiles (economy 21 dates, premium economy 2 dates); Air France/KLM Flying Blue (economy 45 dates, premium economy 38 dates, business class 38 dates); Lufthansa Miles & More (economy 39 dates, business class 31 dates); Qantas Frequent Flyer (economy 14 dates, premium economy 4 dates, business class 4 dates) and 2 more. Dates count departure dates with an open award.
Is there nonstop award space from Seattle (SEA) to Porto (OPO)?
Yes. AwardTool observed nonstop award space in economy, bookable via Lufthansa Miles & More. The lowest nonstop award was 3,642 miles with Lufthansa Miles & More.
Which credit card points can book awards from Seattle (SEA) to Porto (OPO)?
American Express Membership Rewards: Air Canada Aeroplan (1:1), Avianca LifeMiles (1:1), Delta SkyMiles (1:1), Air France/KLM Flying Blue (1:1), Qantas Frequent Flyer (1:1). Bilt Rewards: Air Canada Aeroplan (1:1), Avianca LifeMiles (1:1), Air France/KLM Flying Blue (1:1), Turkish Miles & Smiles (1:1), United MileagePlus (1:1). Capital One Miles: Air Canada Aeroplan (1:1), Avianca LifeMiles (1:1), Air France/KLM Flying Blue (1:1), Qantas Frequent Flyer (1:1), Turkish Miles & Smiles (1:1). Chase Ultimate Rewards: Air Canada Aeroplan (1:1), Air France/KLM Flying Blue (1:1), United MileagePlus (1:1). Citi ThankYou Points: American Airlines AAdvantage (1:1), Avianca LifeMiles (1:1), Air France/KLM Flying Blue (1:1), Qantas Frequent Flyer (1:1), Turkish Miles & Smiles (1:1). Wells Fargo Rewards: Avianca LifeMiles (1:1), Air France/KLM Flying Blue (1:1). Ratios come from AwardTool's transfer partner list; check current bonuses first.
Which months had the lowest award prices from Seattle (SEA) to Porto (OPO)?
Counting only month prices from programs with award space on 2 or more dates that month, and leaving out unusually low outliers: in economy, the lowest award was for Jan 2027 departures, 15,436 miles with Miles & More (3 dates); in business class, the lowest award was for May 2027 departures, 57,500 miles with AAdvantage (10 dates). The month table shows every lowest price, including those. Based on dates we observed, not a forecast.