United MileagePlus award flights from Seattle (SEA) to Liberia, Costa Rica (LIR)
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In the last 30 days AwardTool saw United MileagePlus award space for SEA→LIR in economy, business class and first class. Lowest economy: 20,000 miles + $24.21 (economy space on 60 dates). Lowest business class: 60,600 miles + $29.81 (business-class space on 57 dates). Lowest first class: 60,600 miles + $24.21 (first-class space on 59 dates).
Prices observed – ; newest observation .
Page regenerated from the Oct 19, 2026 data snapshot (normally daily). Summary last changed . Seats change quickly.
- Lowest economy
- 20,000 miles + $24.21
- economy space on 60 dates
- Lowest business class
- 60,600 miles + $29.81
- business-class space on 57 dates
- Lowest first class
- 60,600 miles + $24.21
- first-class space on 59 dates
MileagePlus award prices by cabin
The lowest one-way United MileagePlus award AwardTool observed on SEA→LIR in each cabin, in miles plus taxes.
| Cabin | Points + taxes | Stops | Airlines seen | Seats | Dates seen | Newest observation | |
|---|---|---|---|---|---|---|---|
| Economy | 20,000 miles + $24.21 | 1 stop | United Airlines (UA) | 9+ | 60 | See dates | |
| Business | 60,600 miles + $29.81 | 2 stops | United Airlines (UA) | 9+ | 57 | See dates | |
| First | 60,600 miles + $24.21 | 2 stops | United Airlines (UA) | 9+ | 59 | 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 | 37,200 miles + $24.21 | 9+ | 2 stops | Check this date | ||
| Economy | 38,900 miles + $24.21 | 9+ | 2 stops | Check this date | ||
| Economy | 38,900 miles + $24.21 | 9+ | 1 stop | Check this date | ||
| Business | 104,900 miles + $24.21 | 9+ | 1 stop | Check this date | ||
| Business | 153,400 miles + $24.21 | 7 | 1 stop | Check this date | ||
| First | 80,400 miles + $29.81 | 9+ | 2 stops | Check this date | ||
| First | 100,600 miles + $29.81 | 8 | 2 stops | Check this date | ||
| First | 102,700 miles + $24.21 | 9+ | 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 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 | 60 of 60 | 100% | |
| Business | 57 of 60 | 95% | |
| First | 59 of 60 | 98% |
Best months to fly from Seattle (SEA) to Liberia, Costa Rica (LIR) with MileagePlus
| Month | Economy | Business | First |
|---|---|---|---|
| 56,100 (1 date) | 198,700 (1 date) | 175,000 (1 date) | |
| 37,200 (16 dates) | 104,900 (13 dates) | 80,400 (15 dates) | |
| 20,000 (18 dates) | 69,900 (18 dates) | 60,600 (18 dates) | |
| 20,000 (25 dates) | 60,600 (25 dates) | 60,600 (25 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 Liberia, Costa Rica (LIR)
Lowest one-way award per program and cabin on this route.
| Program | Economy | Premium Economy | Business | First |
|---|---|---|---|---|
| Air Canada Aeroplan | 25,000 pts + $94.22 | — | 107,797 pts + $102.92Mixed cabin | — |
| Air France/KLM Flying Blue | 27,500 pts + $56.61 | — | — | — |
| Alaska Atmos Rewards | 22,500 pts + $24.21 | — | — | 50,000 pts + $44.21Lowest |
| American Airlines AAdvantage | 9,500 pts + $24.21Lowest | — | 27,000 pts + $24.21Lowest | 57,000 pts + $24.21 |
| Delta SkyMiles | 27,500 pts + $24.21 | — | — | 105,000 pts + $24.21 |
| GOL Smiles | 60,500 pts + taxes not reported | 304,200 pts + taxes not reportedLowest | 123,700 pts + taxes not reportedMixed cabin | — |
| Qantas Frequent Flyer | 23,300 pts + $47.61 | — | 68,400 pts + $47.61 | — |
| United MileagePlus | 20,000 pts + $24.21 | — | 60,600 pts + $29.81 | 60,600 pts + $24.21 |
Questions about MileagePlus award flights from Seattle (SEA) to Liberia, Costa Rica (LIR)
How many miles do you need to fly from Seattle (SEA) to Liberia, Costa Rica (LIR) with United MileagePlus?
The lowest one-way United MileagePlus awards AwardTool observed in the last 30 days (newest observation Oct 19, 2026): economy 20,000 miles + $24.21, with a typical monthly low of 20,000 miles over 4 months and award space on 60 departure dates; business class 60,600 miles + $29.81, with a typical monthly low of 69,900 miles over 4 months and award space on 57 departure dates; first class 60,600 miles + $24.21, with a typical monthly low of 60,600 miles over 4 months and award space on 59 departure dates. Monthly lows varied in economy (20,000 to 56,100 miles), business class (60,600 to 198,700 miles) and first class (60,600 to 175,000 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 Liberia, Costa Rica (LIR)?
In economy, 20,000 miles + $24.21. United MileagePlus showed economy award space on 60 departure dates at any price (newest observation Oct 19, 2026, 22:37 UTC). In business class, 60,600 miles + $29.81. United MileagePlus showed business-class award space on 57 departure dates at any price (newest observation Oct 19, 2026, 22:37 UTC). Search live before transferring points.
Can you book nonstop awards from Seattle (SEA) to Liberia, Costa Rica (LIR) 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 Liberia, Costa Rica (LIR)?
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 Liberia, Costa Rica (LIR)?
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 Feb 2027 departures: 20,000 miles (25 dates). The month table shows every lowest price, including those. Based on dates we observed, not a forecast.