United MileagePlus award flights from Seattle (SEA) to Lisbon (LIS)
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In the last 30 days AwardTool saw United MileagePlus award space for SEA→LIS in economy, premium economy, business class and first class. Lowest economy: 39,400 miles + $5.60 (economy space on 239 dates). Lowest business class: 88,000 miles + $22.40 on a mixed-cabin itinerary (part of the trip in a lower cabin; business-class space on 239 dates).
Prices observed – ; newest observation .
Page regenerated from the Oct 19, 2026 data snapshot (normally daily). Summary last changed . Seats change quickly.
- Lowest economy
- 39,400 miles + $5.60
- economy space on 239 dates
- Lowest business class (mixed cabin)
- 88,000 miles + $22.40
- business-class space on 239 dates · part of the trip in a lower cabin
- Lowest first class
- 186,100 miles + $5.60
- first-class space on 239 dates
- Lowest premium economy
- 50,000 miles + $5.60
- premium economy space on 239 dates
MileagePlus award prices by cabin
The lowest one-way United MileagePlus award AwardTool observed on SEA→LIS in each cabin, in miles plus taxes.
| Cabin | Points + taxes | Stops | Airlines seen | Seats | Dates seen | Newest observation | |
|---|---|---|---|---|---|---|---|
| Economy | 39,400 miles + $5.60 | 2 stops | Air Canada (AC), ITA Airways (AZ), JetBlue (B6), Aer Lingus (EI) +9 more | 9+ | 239 | See dates | |
| Premium Economy | 50,000 miles + $5.60 | 1 stop | Aer Lingus (EI), Lufthansa (LH), Brussels Airlines (SN), TAP Portugal (TP) +1 more | 9+ | 239 | See dates | |
| Business | 88,000 miles + $22.40Mixed cabin | 2 stops | Air Canada (AC), Aer Lingus (EI), Lufthansa (LH), SWISS (LX) +3 more | 3 | 239 | See dates | |
| First | 186,100 miles + $5.60 | 2 stops | United Airlines (UA) | 9+ | 239 | 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 MileagePlus award examples
| Departure | Cabin | Points + taxes | Seats | Stops | Observed (UTC) | |
|---|---|---|---|---|---|---|
| Economy | 39,400 miles + $5.60 | 9+ | 2 stops | Check this date | ||
| Economy | 39,400 miles + $5.60 | 2 | 1 stop | Check this date | ||
| Economy | 39,400 miles + $5.60 | 9+ | 1 stop | Check this date | ||
| Premium Economy | 50,000 miles + $5.60 | 9+ | 1 stop | Check this date | ||
| Premium Economy | 50,000 miles + $5.60 | 9+ | 1 stop | Check this date | ||
| Premium Economy | 50,000 miles + $5.60 | 9+ | 1 stop | Check this date | ||
| Business | 88,000 miles + $41.50Mixed cabin | 4 | 2 stops | Check this date | ||
| First | 186,100 miles + $5.60 | 9+ | 2 stops | 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 MileagePlus award space showed up
Departure dates in the next 365 days that AwardTool checked for United MileagePlus 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 | 239 of 239 | 100% | |
| Premium Economy | 239 of 239 | 100% | |
| Business | 239 of 239 | 100% | |
| First | 239 of 239 | 100% |
Best months to fly from Seattle (SEA) to Lisbon (LIS) with MileagePlus
| Month | Economy | Premium Economy | Business | First |
|---|---|---|---|---|
| 39,400 (14 dates) | 50,000 (14 dates) | 88,000 (14 dates)Mixed cabin | 200,000 (14 dates) | |
| 39,400 (17 dates) | 50,000 (17 dates) | 88,000 (17 dates)Mixed cabin | 186,100 (17 dates) | |
| 40,000 (25 dates) | 50,000 (25 dates) | 186,100 (25 dates) | 191,700 (25 dates) | |
| 40,000 (24 dates) | 55,000 (24 dates) | 88,000 (24 dates)Mixed cabin | 191,700 (24 dates) | |
| 40,000 (9 dates) | 55,000 (9 dates) | 88,000 (9 dates)Mixed cabin | 200,000 (9 dates) | |
| 40,000 (15 dates) | 55,000 (15 dates) | 200,000 (15 dates) | 200,000 (15 dates) | |
| 40,000 (22 dates) | 55,000 (22 dates) | 200,000 (22 dates) | 200,000 (22 dates) | |
| 40,000 (14 dates) | 137,700 (14 dates) | 88,000 (14 dates)Mixed cabin | 200,000 (14 dates) | |
| 44,000 (30 dates) | 153,700 (30 dates) | 200,000 (30 dates) | 200,000 (30 dates) | |
| 44,000 (31 dates) | 133,000 (31 dates) | 88,000 (31 dates)Mixed cabin | 200,000 (31 dates) | |
| 40,000 (31 dates) | 133,000 (31 dates) | 88,000 (31 dates)Mixed cabin | 200,000 (31 dates) | |
| 40,000 (7 dates) | 155,300 (7 dates) | 200,000 (7 dates) | 200,000 (7 dates) |
How to get MileagePlus miles
- Bilt Rewards: 1:1 · Instant
- Chase Ultimate Rewards: 1:1 · Instant
Check current transfer bonuses. Most transfers can't be reversed.
MileagePlus vs other programs from Seattle (SEA) to Lisbon (LIS)
Lowest one-way award per program and cabin on this route.
| Program | Economy | Premium Economy | Business | First |
|---|---|---|---|---|
| Air Canada Aeroplan | 40,000 pts + $75.61 | 66,165 pts + $83.61 | 90,000 pts + $98.51 | 485,046 pts + $113.11Mixed cabin |
| Air France/KLM Flying Blue | 25,000 pts + $152.70 | 40,000 pts + $242.20 | 145,000 pts + $361.70 | — |
| Alaska Atmos Rewards | 35,000 pts + $25.60 | 45,000 pts + $25.60 | 70,000 pts + $1,023.20 | 70,000 pts + $25.60Lowest |
| American Airlines AAdvantage | 22,500 pts + $5.60 | 40,000 pts + $5.60 | 57,500 pts + $5.60LowestMixed cabin | 85,000 pts + $24.80Mixed cabin |
| Avianca LifeMiles | 40,000 pts + $28.50 | — | — | — |
| Delta SkyMiles | 24,000 pts + $5.60 | 75,000 pts + $5.60 | 125,000 pts + $35.30Mixed cabin | 125,000 pts + $5.60 |
| Etihad Guest | 67,000 pts + $38.00 | — | 119,999 pts + $335.00 | — |
| GOL Smiles | 24,100 pts + taxes not reported | 143,800 pts + taxes not reported | 572,400 pts + taxes not reported | — |
| JetBlue TrueBlue | 26,700 pts + $152.80 | — | 149,100 pts + $152.90 | — |
| Lufthansa Miles & More | 3,616 pts + $326.00Lowest | — | 101,653 pts + $1,476.90 | — |
| Qantas Frequent Flyer | 43,200 pts + $349.00 | 94,200 pts + $1,579.00 | 108,000 pts + $1,473.20 | — |
| Qatar Airways Privilege Club | 45,000 pts + taxes not reported | — | 161,500 pts + taxes not reportedMixed cabin | — |
| Turkish Miles & Smiles | 55,000 pts + taxes not reported | — | 175,000 pts + taxes not reported | — |
| United MileagePlus | 39,400 pts + $5.60 | 50,000 pts + $5.60 | 88,000 pts + $22.40Mixed cabin | 186,100 pts + $5.60 |
| Virgin Atlantic Flying Club | 15,000 pts + $179.90 | 39,000 pts + $312.00Lowest | — | — |
| Virgin Australia Velocity | 42,000 pts + $9.46 | — | 158,500 pts + $74.52 | — |
Questions about MileagePlus award flights from Seattle (SEA) to Lisbon (LIS)
How many miles do you need to fly from Seattle (SEA) to Lisbon (LIS) with United MileagePlus?
The lowest one-way United MileagePlus awards AwardTool observed in the last 30 days (newest observation Oct 18, 2026): economy 39,400 miles + $5.60, with a typical monthly low of 40,000 miles over 12 months and award space on 239 departure dates; premium economy 50,000 miles + $5.60, with a typical monthly low of 55,000 miles over 12 months and award space on 239 departure dates; business class 88,000 miles + $22.40, a mixed-cabin award, with a typical monthly low of 88,000 miles over 12 months and award space on 239 departure dates; first class 186,100 miles + $5.60, with a typical monthly low of 200,000 miles over 12 months and award space on 239 departure dates. Monthly lows varied in economy (39,400 to 44,000 miles), premium economy (50,000 to 155,300 miles), business class (88,000 to 200,000 miles) and first class (186,100 to 200,000 miles), so the award on your dates may cost more. Search live before transferring points.
What's the lowest MileagePlus award from Seattle (SEA) to Lisbon (LIS)?
In economy, 39,400 miles + $5.60. Seen Sep 24, 2026, 00:43 UTC for an Oct 25, 2026 departure. United MileagePlus showed economy award space on 239 departure dates at any price (newest observation Oct 18, 2026, 22:21 UTC). In business class, 88,000 miles + $22.40 on a mixed-cabin itinerary (part of the trip in a lower cabin). Seen Oct 15, 2026, 07:21 UTC for an Oct 21, 2026 departure. United MileagePlus showed business-class award space on 239 departure dates at any price (newest observation Oct 18, 2026, 22:21 UTC). Search live before transferring points.
Can you book nonstop awards from Seattle (SEA) to Lisbon (LIS) with MileagePlus?
AwardTool hasn't observed nonstop United MileagePlus award space on this route in the last 30 days. That doesn't mean nonstop space never appears.
Which credit card points can book MileagePlus awards from Seattle (SEA) to Lisbon (LIS)?
Bilt Rewards (1:1, Instant) and Chase Ultimate Rewards (1:1, Instant). Check current transfer bonuses; most transfers can't be reversed.
Which months had the lowest MileagePlus award prices from Seattle (SEA) to Lisbon (LIS)?
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 Nov 2026 departures: 39,400 miles (17 dates). The month table shows every lowest price, including those. Based on dates we observed, not a forecast.