Delta SkyMiles award flights from Seattle (SEA) to Porto (OPO)
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In the last 30 days AwardTool saw Delta SkyMiles award space for SEA→OPO in economy, premium economy, business class and first class. Lowest economy: 26,600 miles + $5.60 (economy space on 49 dates). Lowest business class: 125,000 miles + $55.80 on a mixed-cabin itinerary (part of the trip in a lower cabin; business-class space on 15 dates).
Prices observed – ; newest observation .
Page regenerated from the Oct 19, 2026 data snapshot (normally daily). Summary last changed . Seats change quickly.
- Lowest economy
- 26,600 miles + $5.60
- economy space on 49 dates
- Lowest business class (mixed cabin)
- 125,000 miles + $55.80
- business-class space on 15 dates · part of the trip in a lower cabin
- Lowest first class
- 376,000 miles + $24.50
- first-class space on 43 dates
- Lowest premium economy
- 75,000 miles + $5.60
- premium economy space on 37 dates
SkyMiles award prices by cabin
The lowest one-way Delta SkyMiles award AwardTool observed on SEA→OPO in each cabin, in miles plus taxes.
| Cabin | Points + taxes | Stops | Airlines seen | Seats | Dates seen | Newest observation | |
|---|---|---|---|---|---|---|---|
| Economy | 26,600 miles + $5.60 | 1 stop | Air France (AF), Delta Air Lines (DL), KLM (KL) | 9+ | 49 | See dates | |
| Premium Economy | 75,000 miles + $5.60 | 1 stop | Air France (AF), Delta Air Lines (DL), KLM (KL) | 9+ | 37 | See dates | |
| Business | 125,000 miles + $55.80Mixed cabin | 2 stops | Air France (AF), Delta Air Lines (DL), KLM (KL) | 7 | 15 | See dates | |
| First | 376,000 miles + $24.50 | 2 stops | Air France (AF), Delta Air Lines (DL), KLM (KL) | 3 | 43 | See dates |
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 SkyMiles award examples
| Departure | Cabin | Points + taxes | Seats | Stops | Observed (UTC) | |
|---|---|---|---|---|---|---|
| Economy | 38,200 miles + $5.60 | 9+ | 1 stop | Check this date | ||
| Economy | 42,300 miles + $16.88 | 9+ | 1 stop | Check this date | ||
| Economy | 42,300 miles + $5.60 | 9+ | 1 stop | Check this date | ||
| Premium Economy | 113,000 miles + $24.40 | 2 | 1 stop | Check this date | ||
| Premium Economy | 185,900 miles + $5.60 | 3 | 1 stop | Check this date | ||
| Business | 499,900 miles + $24.40 | 9+ | 1 stop | Check this date | ||
| Business | 499,900 miles + $43.80 | 9+ | 2 stops | Check this date | ||
| First | 499,900 miles + $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.
How often SkyMiles award space showed up
Departure dates in the next 365 days that AwardTool checked for Delta SkyMiles in the last 30 days, how many had award space in each cabin at any price, and the latest departure with space.
| Cabin | Dates with space | Share of dates checked | Latest departure with space |
|---|---|---|---|
| Economy | 49 of 57 | 85% | |
| Premium Economy | 37 of 57 | 64% | |
| Business | 15 of 57 | 26% | |
| First | 43 of 57 | 75% |
Best months to fly from Seattle (SEA) to Porto (OPO) with SkyMiles
| Month | Economy | Premium Economy | Business | First |
|---|---|---|---|---|
| 54,400 (2 dates) | 185,900 (1 date) | — | 499,900 (1 date) | |
| 38,200 (4 dates) | 113,000 (2 dates) | 499,900 (3 dates) | 499,900 (4 dates) | |
| 113,300 (3 dates) | 269,800 (3 dates) | — | 499,900 (3 dates) | |
| 36,100 (3 dates) | 106,100 (3 dates) | 406,000 (3 dates) | 406,000 (2 dates) | |
| 31,500 (6 dates) | 75,000 (5 dates) | 125,000 (6 dates)Mixed cabin | 381,000 (6 dates) | |
| 36,000 (9 dates) | 98,100 (2 dates) | 406,000 (2 dates) | 381,000 (5 dates) | |
| 26,600 (6 dates) | 75,000 (6 dates) | — | 404,500 (6 dates) | |
| 29,700 (9 dates) | 111,000 (8 dates) | — | 499,900 (9 dates) | |
| 47,500 (2 dates) | 192,600 (2 dates) | — | 499,900 (2 dates) | |
| 37,800 (5 dates) | 194,000 (5 dates) | 401,000 (1 date) | 376,000 (5 dates) |
How to get SkyMiles
- American Express Membership Rewards: 1:1 · Instant
Check current transfer bonuses. Most transfers can't be reversed.
SkyMiles vs other programs from Seattle (SEA) to Porto (OPO)
Lowest one-way award per program and cabin on this route.
| Program | Economy | Premium Economy | Business | First |
|---|---|---|---|---|
| Air Canada Aeroplan | 40,000 pts + $75.71 | 70,591 pts + $51.61 | 266,224 pts + $128.61Mixed cabin | — |
| Air France/KLM Flying Blue | 25,000 pts + $152.60 | 89,000 pts + $246.30 | 146,000 pts + $360.40 | — |
| American Airlines AAdvantage | 22,500 pts + $35.40 | 40,000 pts + $35.40Lowest | 57,500 pts + $763.10Lowest | — |
| Avianca LifeMiles | 39,000 pts + $58.00 | — | — | — |
| Delta SkyMiles | 26,600 pts + $5.60 | 75,000 pts + $5.60 | 125,000 pts + $55.80Mixed cabin | 376,000 pts + $24.50 |
| GOL Smiles | 9,500 pts + taxes not reported | 599,100 pts + taxes not reported | — | — |
| Lufthansa Miles & More | 3,642 pts + $326.10Lowest | — | 101,168 pts + $1,526.60 | — |
| Qantas Frequent Flyer | 43,500 pts + $356.60 | 102,300 pts + $1,646.10 | 108,000 pts + $1,533.60 | — |
| Turkish Miles & Smiles | 55,000 pts + taxes not reported | — | 90,000 pts + taxes not reported | — |
| United MileagePlus | 40,000 pts + $5.60 | 55,000 pts + $22.40 | 88,000 pts + $22.40Mixed cabin | 186,100 pts + $11.20Lowest |
Questions about SkyMiles award flights from Seattle (SEA) to Porto (OPO)
How many miles do you need to fly from Seattle (SEA) to Porto (OPO) with Delta SkyMiles?
The lowest one-way Delta SkyMiles awards AwardTool observed in the last 30 days: economy 26,600 miles + $5.60, with a typical monthly low of 36,100 miles over 10 months and award space on 49 departure dates (newest observation Oct 17, 2026); premium economy 75,000 miles + $5.60, with a typical monthly low of 111,000 miles over 10 months and award space on 37 departure dates (newest observation Oct 16, 2026); business class 125,000 miles + $55.80, a mixed-cabin award, with a typical monthly low of 406,000 miles over 5 months and award space on 15 departure dates (newest observation Oct 17, 2026); first class 376,000 miles + $24.50, with a typical monthly low of 406,000 miles over 10 months and award space on 43 departure dates (newest observation Oct 17, 2026). Monthly lows varied in economy (26,600 to 113,300 miles), premium economy (75,000 to 269,800 miles), business class (125,000 to 499,900 miles) and first class (376,000 to 499,900 miles), so the award on your dates may cost more. Search live before transferring points.
What's the lowest SkyMiles award from Seattle (SEA) to Porto (OPO)?
In economy, 26,600 miles + $5.60. Delta SkyMiles showed economy award space on 49 departure dates at any price (newest observation Oct 17, 2026, 00:30 UTC). In business class, 125,000 miles + $55.80 on a mixed-cabin itinerary (part of the trip in a lower cabin). Delta SkyMiles showed business-class award space on 15 departure dates at any price (newest observation Oct 17, 2026, 00:30 UTC). Search live before transferring points.
Can you book nonstop awards from Seattle (SEA) to Porto (OPO) with SkyMiles?
AwardTool hasn't observed nonstop Delta SkyMiles award space on this route in the last 30 days. That doesn't mean nonstop space never appears.
Which credit card points can book SkyMiles awards from Seattle (SEA) to Porto (OPO)?
American Express Membership Rewards (1:1, Instant). Check current transfer bonuses; most transfers can't be reversed.
Which months had the lowest SkyMiles 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, the lowest economy award AwardTool observed was for Apr 2027 departures: 26,600 miles (6 dates). The month table shows every lowest price, including those. Based on dates we observed, not a forecast.