United MileagePlus award flights from Seattle (SEA) to San Diego (SAN)
In the last 30 days AwardTool saw United MileagePlus award space for SEA→SAN in economy and first. Lowest economy: 12,600 miles + $5.60 (economy space on 323 dates). Lowest first: 30,000 miles + $5.60 (first space on 323 dates).
Data as of
Award prices last changed . AwardTool checks these routes daily; seats change quickly.
- Lowest economy
- 12,600 miles + $5.60
- economy space on 323 dates
- Lowest first
- 30,000 miles + $5.60
- first space on 323 dates
MileagePlus award prices by cabin
The lowest one-way United MileagePlus award AwardTool observed on SEA→SAN in each cabin, in miles plus taxes.
| Cabin | Points + taxes | Stops | Airlines seen | Seats | Dates seen | Newest observation | |
|---|---|---|---|---|---|---|---|
| Economy | 12,600 miles + $5.60 | 1 stop | United Airlines (UA) | 9+ | 323 | See dates | |
| First | 30,000 miles + $5.60 | 1 stopMixed cabin | United Airlines (UA) | 1 | 323 | 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 | 12,600 miles + $5.60 | 9+ | 1 stop | Check this date | ||
| Economy | 12,600 miles + $5.60 | 9+ | 1 stop | Check this date | ||
| Economy | 12,600 miles + $5.60 | 9+ | 1 stop | Check this date | ||
| First | 30,000 miles + $5.60 | 1 | 1 stop | Check this date | ||
| First | 30,000 miles + $5.60 | 1 | 1 stop | Check this date | ||
| First | 30,000 miles + $5.60 | 1 | 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 SEA to SAN with MileagePlus
| Month | Economy | First |
|---|---|---|
| 12,600 (16 dates) | 30,000 (16 dates) | |
| 12,600 (30 dates) | 32,200 (30 dates) | |
| 12,600 (31 dates) | 32,200 (31 dates) | |
| 12,600 (31 dates) | 32,200 (31 dates) | |
| 12,600 (28 dates) | 32,200 (28 dates) | |
| 12,600 (31 dates) | 32,200 (31 dates) | |
| 15,000 (30 dates) | 38,800 (30 dates) | |
| 15,000 (31 dates) | 38,800 (31 dates) | |
| 15,000 (30 dates) | 38,800 (30 dates) | |
| 15,000 (31 dates) | 38,800 (31 dates) | |
| 15,000 (31 dates) | 38,800 (31 dates) | |
| 15,000 (3 dates) | 38,800 (3 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 SEA–SAN
Lowest one-way award per program and cabin on this route.
| Program | Economy | Business | First |
|---|---|---|---|
| Air Canada Aeroplan | 15,000 pts + $32.97 | — | 30,000 pts + $32.97 |
| Air France/KLM Flying Blue | 13,125 pts + $29.56 | 32,375 pts + $30.91 | — |
| Alaska Atmos Rewards | 7,500 pts + $5.60 | — | 20,000 pts + $5.60 |
| American Airlines AAdvantage | 8,500 pts + $5.60 | — | 18,500 pts + $5.60Lowest |
| Avianca LifeMiles | 15,000 pts + $5.60 | — | — |
| Delta SkyMiles | 3,200 pts + $5.60Lowest | — | 18,600 pts + $5.60 |
| Etihad Guest | 15,000 pts + $35.33 | — | — |
| JetBlue True Blue | 25,000 pts + $5.60 | — | — |
| Qantas Frequent Flyer | 16,100 pts + $5.60 | 31,500 pts + $5.60Lowest | — |
| United MileagePlus | 12,600 pts + $5.60 | — | 30,000 pts + $5.60 |
| Virgin Atlantic Flying Club | 16,500 pts + $5.60 | — | 59,500 pts + $5.60 |
| Virgin Australia Velocity | 12,500 pts + $13.77 | — | — |
Questions about MileagePlus award flights from SEA to SAN
What's the lowest MileagePlus award from Seattle to San Diego?
In economy, 12,600 miles + $5.60. United MileagePlus showed economy award space on 323 departure dates (newest observation Oct 16, 2026, 02:03 UTC). In first, 30,000 miles + $5.60. United MileagePlus showed first award space on 323 departure dates (newest observation Oct 16, 2026, 02:03 UTC). Search live before transferring points.
Can you book nonstop SEA to SAN 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 SEA to SAN?
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: 12,600 miles (31 dates). The month table shows every lowest price, including those. Based on dates we observed, not a forecast.