United MileagePlus award flights from Boston (BOS) to Liberia, Costa Rica (LIR)
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In the last 30 days AwardTool saw United MileagePlus award space for BOS→LIR in economy, business class and first class. Lowest economy: 20,000 miles + $24.21 (economy space on 50 dates). Lowest business class: 52,400 miles + $24.21 (business-class space on 43 dates). Lowest first class: 53,000 miles + $29.81 (first-class space on 49 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 50 dates
- Lowest business class
- 52,400 miles + $24.21
- business-class space on 43 dates
- Lowest first class
- 53,000 miles + $29.81
- first-class space on 49 dates
MileagePlus award prices by cabin
The lowest one-way United MileagePlus award AwardTool observed on BOS→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 stopNonstop from 35,000 pts | Air Canada (AC), JetBlue (B6), United Airlines (UA) | 9+ | 50 | See dates | |
| Business | 52,400 miles + $24.21 | 1 stopNonstop from 85,000 pts | JetBlue (B6), United Airlines (UA) | 9+ | 43 | See dates | |
| First | 53,000 miles + $29.81 | 2 stops | United Airlines (UA) | 9+ | 49 | 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 | 20,000 miles + $24.21 | 9+ | 1 stop | Check this date | ||
| Economy | 23,300 miles + $24.21 | 9+ | 1 stop | Check this date | ||
| Economy | 70,000 miles + $24.21 | 9+ | 1 stop | Check this date | ||
| Business | 85,000 miles + $24.21 | 1 | Nonstop | Check this date | ||
| First | 67,000 miles + $24.21 | 9+ | 1 stop | Check this date | ||
| First | 68,100 miles + $24.21 | 8 | 1 stop | Check this date | ||
| First | 191,600 miles + $24.21 | 5 | 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 | 50 of 50 | 100% | |
| Business | 43 of 50 | 86% | |
| First | 49 of 50 | 98% |
Best months to fly from Boston (BOS) to Liberia, Costa Rica (LIR) with MileagePlus
| Month | Economy | Business | First |
|---|---|---|---|
| 20,000 (1 date) | 85,000 (1 date) | 68,100 (1 date) | |
| 23,300 (2 dates) | — | 67,000 (2 dates) | |
| 20,000 (11 dates) | 52,400 (10 dates) | 61,300 (10 dates) | |
| 20,000 (6 dates) | 122,200 (3 dates) | 61,900 (6 dates) | |
| 26,900 (2 dates) | 93,100 (2 dates) | 79,100 (2 dates) | |
| 22,000 (13 dates) | 66,100 (12 dates) | 71,800 (13 dates) | |
| 26,900 (15 dates) | 86,300 (15 dates) | 53,000 (15 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 Boston (BOS) to Liberia, Costa Rica (LIR)
Lowest one-way award per program and cabin on this route.
| Program | Economy | Business | First |
|---|---|---|---|
| Air Canada Aeroplan | 17,500 pts + $94.42 | 40,357 pts + $102.22Mixed cabin | — |
| Alaska Atmos Rewards | 17,500 pts + $44.21 | — | 35,000 pts + $44.21LowestMixed cabin |
| American Airlines AAdvantage | 11,500 pts + $24.21Lowest | 23,000 pts + $24.21Lowest | 57,000 pts + $24.21 |
| Avianca LifeMiles | 17,500 pts + $58.00 | — | — |
| Delta SkyMiles | 15,600 pts + $24.21 | — | 70,800 pts + $24.21 |
| Etihad Guest | 28,000 pts + $52.11 | 45,000 pts + $56.61Mixed cabin | — |
| GOL Smiles | 37,700 pts + taxes not reported | 88,500 pts + taxes not reportedMixed cabin | — |
| JetBlue TrueBlue | 11,900 pts + $24.21 | 33,500 pts + $24.21 | — |
| United MileagePlus | 20,000 pts + $24.21 | 52,400 pts + $24.21 | 53,000 pts + $29.81 |
| Virgin Atlantic Flying Club | 22,000 pts + $24.21 | — | 70,000 pts + $24.21 |
Questions about MileagePlus award flights from Boston (BOS) to Liberia, Costa Rica (LIR)
How many miles do you need to fly from Boston (BOS) 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 18, 2026): economy 20,000 miles + $24.21, with a typical monthly low of 22,000 miles over 7 months and award space on 50 departure dates; business class 52,400 miles + $24.21, with a typical monthly low of 85,000 miles over 6 months and award space on 43 departure dates; first class 53,000 miles + $29.81, with a typical monthly low of 67,000 miles over 7 months and award space on 49 departure dates. Monthly lows varied in economy (20,000 to 26,900 miles), business class (52,400 to 122,200 miles) and first class (53,000 to 79,100 miles), so the award on your dates may cost more. Search live before transferring points.
What's the lowest MileagePlus award from Boston (BOS) to Liberia, Costa Rica (LIR)?
In economy, 20,000 miles + $24.21. Seen Oct 8, 2026, 10:36 UTC for an Oct 31, 2026 departure. United MileagePlus showed economy award space on 50 departure dates at any price (newest observation Oct 18, 2026, 20:42 UTC). In business class, 52,400 miles + $24.21. United MileagePlus showed business-class award space on 43 departure dates at any price (newest observation Oct 18, 2026, 20:42 UTC). Search live before transferring points.
Can you book nonstop awards from Boston (BOS) to Liberia, Costa Rica (LIR) with MileagePlus?
Yes. AwardTool observed nonstop United MileagePlus award space in business class, and in economy from 35,000 miles.
Which credit card points can book MileagePlus awards from Boston (BOS) 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 Boston (BOS) 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 Dec 2026 departures: 20,000 miles (11 dates). The month table shows every lowest price, including those. Based on dates we observed, not a forecast.