# Boston (BOS) to Guanacaste (LIR) · Dec 15, 2026 · return Dec 21, 2026

Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

**See flights for these dates:** each price link opens AI flight search for that row's exact dates and travelers. Select the complete itinerary there.

| Exact travel dates | Airline | Flights | Total price | Price issued (UTC) |
| --- | --- | --- | ---: | --- |
| 2026-12-15 → 2026-12-21 | JetBlue Airways | B6897 / B6898 | [Axel-exclusive $692.13](https://helloaxel.com/en/f/start/from/bos/to/lir/depart/december-15-2026/return/december-21-2026/adults/1/cabin/economy) | 2026-10-29T00:52:23Z |
| 2026-12-15 → 2026-12-21 | American Airlines | AA1249 + AA887 / AA1919 + AA2227 | [Axel-exclusive $661.50](https://helloaxel.com/en/f/start/from/bos/to/lir/depart/december-15-2026/return/december-21-2026/adults/1/cabin/economy) | 2026-10-29T00:52:23Z |
| 2026-12-15 → 2026-12-21 | United Airlines | UA1388 + UA1737 / UA1548 + UA755 | [Axel-exclusive $673.75](https://helloaxel.com/en/f/start/from/bos/to/lir/depart/december-15-2026/return/december-21-2026/adults/1/cabin/economy) | 2026-10-29T00:52:23Z |
| 2026-12-15 → 2026-12-21 | Air Canada / Delta Air Lines | AC8603 + AC1863 / DL1856 | [Axel-exclusive $691.38](https://helloaxel.com/en/f/start/from/bos/to/lir/depart/december-15-2026/return/december-21-2026/adults/1/cabin/economy) | 2026-10-29T00:52:23Z |
| 2026-12-15 → 2026-12-21 | JetBlue Airways | B6569 + B61157 / B6898 | [Axel-exclusive $654.63](https://helloaxel.com/en/f/start/from/bos/to/lir/depart/december-15-2026/return/december-21-2026/adults/1/cabin/economy) | 2026-10-29T00:52:23Z |
| 2026-12-15 → 2026-12-21 | United Airlines | UA1734 + UA1547 / UA1548 + UA755 | [Axel-exclusive $673.75](https://helloaxel.com/en/f/start/from/bos/to/lir/depart/december-15-2026/return/december-21-2026/adults/1/cabin/economy) | 2026-10-29T00:52:23Z |
| 2026-12-15 → 2026-12-21 | Air Canada / Delta Air Lines | AC763 + AC1873 / DL1856 | [Axel-exclusive $691.38](https://helloaxel.com/en/f/start/from/bos/to/lir/depart/december-15-2026/return/december-21-2026/adults/1/cabin/economy) | 2026-10-29T00:52:23Z |

[Route overview: Boston to Guanacaste (LIR) flight deals](/en/flights/from-boston-to-guanacaste-lir)

### 2026-12-15 → 2026-12-21 · Axel-exclusive $692.13

- JetBlue Airways B6897: BOS 2026-12-15 07:52:00 → LIR 2026-12-15 12:45:00; nonstop; 353 minutes. Local airport times.
- JetBlue Airways B6898: LIR 2026-12-21 16:45:00 → BOS 2026-12-21 23:10:00; nonstop; 325 minutes. Local airport times.

### 2026-12-15 → 2026-12-21 · Axel-exclusive $661.50

- American Airlines AA1249 / AA887: BOS 2026-12-15 05:00:00 → LIR 2026-12-15 12:30:00; 1 stop(s) via CLT; 510 minutes. Local airport times.
  - AA1249: BOS 2026-12-15 05:00:00 → CLT 2026-12-15 07:34:00; layover at CLT: 96 minutes.
  - AA887: CLT 2026-12-15 09:10:00 → LIR 2026-12-15 12:30:00.
- American Airlines AA1919 / AA2227: LIR 2026-12-21 11:58:00 → BOS 2026-12-21 22:58:00; 1 stop(s) via MIA; 600 minutes. Local airport times.
  - AA1919: LIR 2026-12-21 11:58:00 → MIA 2026-12-21 15:52:00; layover at MIA: 221 minutes.
  - AA2227: MIA 2026-12-21 19:33:00 → BOS 2026-12-21 22:58:00.

### 2026-12-15 → 2026-12-21 · Axel-exclusive $673.75

- United Airlines UA1388 / UA1737: BOS 2026-12-15 09:30:00 → LIR 2026-12-15 18:37:00; 1 stop(s) via IAH; 607 minutes. Local airport times.
  - UA1388: BOS 2026-12-15 09:30:00 → IAH 2026-12-15 13:06:00; layover at IAH: 119 minutes.
  - UA1737: IAH 2026-12-15 15:05:00 → LIR 2026-12-15 18:37:00.
- United Airlines UA1548 / UA755: LIR 2026-12-21 14:00:00 → BOS 2026-12-21 23:59:00; 1 stop(s) via IAD; 539 minutes. Local airport times.
  - UA1548: LIR 2026-12-21 14:00:00 → IAD 2026-12-21 19:35:00; layover at IAD: 165 minutes.
  - UA755: IAD 2026-12-21 22:20:00 → BOS 2026-12-21 23:59:00.

### 2026-12-15 → 2026-12-21 · Axel-exclusive $691.38

- Air Canada AC8603 / AC1863: BOS 2026-12-15 05:30:00 → LIR 2026-12-15 14:20:00; 1 stop(s) via YUL; 590 minutes. Local airport times.
  - AC8603: BOS 2026-12-15 05:30:00 → YUL 2026-12-15 06:55:00; layover at YUL: 130 minutes.
  - AC1863: YUL 2026-12-15 09:05:00 → LIR 2026-12-15 14:20:00.
- Delta Air Lines DL1856: LIR 2026-12-21 15:15:00 → BOS 2026-12-21 21:42:00; nonstop; 327 minutes. Local airport times.

### 2026-12-15 → 2026-12-21 · Axel-exclusive $654.63

- JetBlue Airways B6569 / B61157: BOS 2026-12-15 05:30:00 → LIR 2026-12-15 14:04:00; 1 stop(s) via FLL; 574 minutes. Local airport times.
  - B6569: BOS 2026-12-15 05:30:00 → FLL 2026-12-15 08:56:00; layover at FLL: 184 minutes.
  - B61157: FLL 2026-12-15 12:00:00 → LIR 2026-12-15 14:04:00.
- JetBlue Airways B6898: LIR 2026-12-21 16:45:00 → BOS 2026-12-21 23:10:00; nonstop; 325 minutes. Local airport times.

### 2026-12-15 → 2026-12-21 · Axel-exclusive $673.75

- United Airlines UA1734 / UA1547: BOS 2026-12-15 05:45:00 → LIR 2026-12-15 12:50:00; 1 stop(s) via IAD; 485 minutes. Local airport times.
  - UA1734: BOS 2026-12-15 05:45:00 → IAD 2026-12-15 07:25:00; layover at IAD: 86 minutes.
  - UA1547: IAD 2026-12-15 08:51:00 → LIR 2026-12-15 12:50:00.
- United Airlines UA1548 / UA755: LIR 2026-12-21 14:00:00 → BOS 2026-12-21 23:59:00; 1 stop(s) via IAD; 539 minutes. Local airport times.
  - UA1548: LIR 2026-12-21 14:00:00 → IAD 2026-12-21 19:35:00; layover at IAD: 165 minutes.
  - UA755: IAD 2026-12-21 22:20:00 → BOS 2026-12-21 23:59:00.

### 2026-12-15 → 2026-12-21 · Axel-exclusive $691.38

- Air Canada AC763 / AC1873: BOS 2026-12-15 05:45:00 → LIR 2026-12-15 14:10:00; 1 stop(s) via YYZ; 565 minutes. Local airport times.
  - AC763: BOS 2026-12-15 05:45:00 → YYZ 2026-12-15 07:50:00; layover at YYZ: 100 minutes.
  - AC1873: YYZ 2026-12-15 09:30:00 → LIR 2026-12-15 14:10:00.
- Delta Air Lines DL1856: LIR 2026-12-21 15:15:00 → BOS 2026-12-21 21:42:00; nonstop; 327 minutes. Local airport times.

### Explore this route

- [All dates for this route](/en/flights/choose/bos-lir)
- [Dec 14, 2026 · Return options](/en/flights/choose/bos-lir/dec-14)
- [Dec 16, 2026 · Return options](/en/flights/choose/bos-lir/dec-16)
- [Hotels in Sardinal, Guanacaste Province with Axel](https://helloaxel.com/en/hotels/destinations/sardinal-guanacaste-province)

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**Feedback (optional):** [Missing info](https://helloaxel.com/en/flights/choose/bos-lir/dec-15/dec-21?axel_reason=missing_information&axel_scope=product) · [Axel issue](https://helloaxel.com/en/flights/choose/bos-lir/dec-15/dec-21?axel_reason=product_issue&axel_scope=product)