United MileagePlus award flights from Detroit (DTW) to Seattle (SEA)
In the last 30 days AwardTool saw United MileagePlus award space for DTW→SEA in economy, premium economy, business and first. Lowest economy: 15,000 miles + $5.60 (economy space on 330 dates). Lowest business: 80,000 miles + $5.60 (business space on 271 dates). Lowest first: 30,000 miles + $5.60 (first space on 330 dates).
Data as of
Award prices last changed . AwardTool checks these routes daily; seats change quickly.
- Lowest economy
- 15,000 miles + $5.60
- economy space on 330 dates
- Lowest business
- 80,000 miles + $5.60
- business space on 271 dates
- Lowest first
- 30,000 miles + $5.60
- first space on 330 dates
- Lowest premium economy
- 100,000 miles + $5.60
- premium economy space on 307 dates
MileagePlus award prices by cabin
The lowest one-way United MileagePlus award AwardTool observed on DTW→SEA in each cabin, in miles plus taxes.
| Cabin | Points + taxes | Stops | Airlines seen | Seats | Dates seen | Newest observation | |
|---|---|---|---|---|---|---|---|
| Economy | 15,000 miles + $5.60 | 1 stop | JetBlue (B6), United Airlines (UA) | 9+ | 330 | See dates | |
| Premium Economy | 100,000 miles + $5.60 | 2 stops | United Airlines (UA) | 9+ | 307 | See dates | |
| Business | 80,000 miles + $5.60 | 2 stops | United Airlines (UA) | 9+ | 271 | See dates | |
| First | 30,000 miles + $5.60 | 1 stop | JetBlue (B6), United Airlines (UA) | 1 | 330 | 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 | 15,000 miles + $5.60 | 9+ | 1 stop | Check this date | ||
| Economy | 15,000 miles + $5.60 | 9+ | 1 stop | Check this date | ||
| Economy | 15,000 miles + $5.60 | 9+ | 1 stop | Check this date | ||
| Premium Economy | 100,000 miles + $5.60 | 9+ | 2 stops | Check this date | ||
| Business | 100,000 miles + $5.60 | 6 | 2 stops | Check this date | ||
| First | 30,000 miles + $5.60 | 1 | 1 stop | Check this date | ||
| First | 30,000 miles + $5.60 | 4 | 1 stop | Check this date | ||
| First | 30,000 miles + $5.60 | 3 | 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 at the time shown. 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.
Best months to fly DTW to SEA with MileagePlus
| Month | Economy | Premium Economy | Business | First |
|---|---|---|---|---|
| 15,000 (16 dates) | 100,000 (7 dates) | 100,000 (5 dates) | 30,000 (16 dates) | |
| 15,000 (30 dates) | 100,000 (19 dates) | 100,000 (13 dates) | 30,000 (30 dates) | |
| 15,000 (31 dates) | 100,000 (30 dates) | 100,000 (24 dates) | 53,000 (31 dates) | |
| 15,000 (31 dates) | 100,000 (29 dates) | 100,000 (30 dates) | 53,000 (31 dates) | |
| 15,000 (28 dates) | 100,000 (28 dates) | 80,000 (24 dates) | 53,000 (28 dates) | |
| 15,000 (31 dates) | 100,000 (31 dates) | 100,000 (26 dates) | 53,000 (31 dates) | |
| 15,000 (30 dates) | 100,000 (30 dates) | 100,000 (27 dates) | 59,700 (30 dates) | |
| 15,000 (31 dates) | 100,000 (31 dates) | 80,000 (27 dates) | 59,700 (31 dates) | |
| 15,000 (30 dates) | 100,000 (30 dates) | 100,000 (25 dates) | 59,700 (30 dates) | |
| 15,000 (31 dates) | 100,000 (31 dates) | 100,000 (30 dates) | 59,700 (31 dates) | |
| 15,000 (31 dates) | 100,000 (31 dates) | 100,000 (30 dates) | 59,700 (31 dates) | |
| 15,000 (10 dates) | 100,000 (10 dates) | 100,000 (10 dates) | 59,700 (10 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 on DTW–SEA
Lowest one-way award per program and cabin on this route.
| Program | Economy | Premium Economy | Business | First |
|---|---|---|---|---|
| Air Canada Aeroplan | 17,500 pts + $32.94 | — | — | 30,000 pts + $32.94 |
| Air France/KLM Flying Blue | 15,000 pts + $20.42 | — | 60,000 pts + $43.19 | — |
| Alaska Atmos Rewards | 10,000 pts + $5.60Lowest | — | — | 25,000 pts + $5.60Lowest |
| American Airlines AAdvantage | 10,000 pts + $5.60 | — | — | 25,000 pts + $5.60 |
| Avianca LifeMiles | 15,000 pts + $5.60 | — | 30,000 pts + $5.60Lowest | — |
| Delta SkyMiles | 14,200 pts + $5.60 | — | — | 54,200 pts + $5.60 |
| Etihad Guest | 23,000 pts + $40.73 | — | 40,000 pts + $52.20 | — |
| JetBlue True Blue | 35,400 pts + $5.60 | — | — | — |
| Qantas Frequent Flyer | 20,700 pts + $5.60 | — | 43,600 pts + $5.60 | — |
| United MileagePlus | 15,000 pts + $5.60 | 100,000 pts + $5.60Lowest | 80,000 pts + $5.60 | 30,000 pts + $5.60 |
| Virgin Atlantic Flying Club | 18,500 pts + $5.60 | — | — | 101,000 pts + $5.60 |
| Virgin Australia Velocity | 19,000 pts + $13.70 | — | — | 37,500 pts + $13.77 |
Questions about MileagePlus award flights from DTW to SEA
What's the lowest MileagePlus award from Detroit to Seattle?
In economy, 15,000 miles + $5.60. United MileagePlus showed economy award space on 330 departure dates (newest observation Oct 15, 2026, 22:44 UTC). In business, 80,000 miles + $5.60. United MileagePlus showed business award space on 271 departure dates (newest observation Oct 15, 2026, 12:42 UTC). Search live before transferring points.
Can you book nonstop DTW to SEA awards 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 transfer to MileagePlus?
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 DTW to SEA?
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 Dec 2026 departures: 15,000 miles (31 dates). The month table shows every lowest price, including those. Based on dates we observed, not a forecast.