Boston → Porto
Dec 21, 2026 · one way
BOS → OPO1 adulteconomyOne way
7 flight options · 6 airlines
Nonstop flights
One-stop flights
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Why book with Axel
- A real airline bookingThe booking is in the airline’s own system under your name. After you book, TAP Air Portugal emails you its confirmation code and e-ticket, usually within 15 minutes and occasionally up to a couple of hours while the booking is processed.
- Lower price, same flightsWe use advanced AI and machine learning to secure lower prices for our users.
- Not satisfied? Full refund.If you are unhappy with the experience for any reason, or simply change your mind, cancel within 24 hours of booking (departure 7+ days away) and we refund you in full. We stand by our product. Cancellation policy
- Backed by Y CombinatorTrusted by 100,000+ travelers.
Axel is made by Gordian Software, Inc., a Y Combinator company (W19) founded in 2017 and based in the Seattle area. The company is led by CEO Stephen Grabowski, formerly of Skyscanner. How Axel works · About
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Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.
| Exact travel dates | Airline | Flights | Total price | Price issued (UTC) |
|---|---|---|---|---|
| 2026-12-21 · one way | TAP Air Portugal | TP228 | $494.00 | 2026-10-29T00:52:35Z |
| 2026-12-21 · one way | S4 | S4224 + S4172 | $403.00 | 2026-10-29T00:52:35Z |
| 2026-12-21 · one way | Iberia | IB346 + IB1149 | $585.00 | 2026-10-29T00:52:35Z |
| 2026-12-21 · one way | Air France | AF61 + AF1528 | $676.00 | 2026-10-29T00:52:35Z |
| 2026-12-21 · one way | United Airlines | UA3610 + TP214 | $702.00 | 2026-10-29T00:52:35Z |
| 2026-12-21 · one way | Delta Air Lines | DL5814 + DL138 | $715.00 | 2026-10-29T00:52:35Z |
| 2026-12-21 · one way | TAP Air Portugal | TP216 + TP1926 | $442.00 | 2026-10-29T00:52:35Z |
2026-12-21 · one way · $494.00
- TAP Air Portugal TP228: BOS 2026-12-21 22:45:00 → OPO 2026-12-22 10:30:00; nonstop; 405 minutes. Local airport times.
2026-12-21 · one way · $403.00
- S4 S4224 / S4172: BOS 2026-12-21 21:25:00 → OPO 2026-12-22 11:50:00; 1 stop(s) via PDL; 565 minutes. Local airport times.
- S4224: BOS 2026-12-21 21:25:00 → PDL 2026-12-22 06:20:00; layover at PDL: 130 minutes.
- S4172: PDL 2026-12-22 08:30:00 → OPO 2026-12-22 11:50:00.
2026-12-21 · one way · $585.00
- Iberia IB346 / IB1149: BOS 2026-12-21 20:00:00 → OPO 2026-12-22 11:45:00; 1 stop(s) via MAD; 645 minutes. Local airport times.
- IB346: BOS 2026-12-21 20:00:00 → MAD 2026-12-22 08:50:00; layover at MAD: 155 minutes.
- IB1149: MAD 2026-12-22 11:25:00 → OPO 2026-12-22 11:45:00.
2026-12-21 · one way · $676.00
- Air France AF61 / AF1528: BOS 2026-12-21 18:20:00 → OPO 2026-12-22 10:35:00; 1 stop(s) via CDG; 675 minutes. Local airport times.
- AF61: BOS 2026-12-21 18:20:00 → CDG 2026-12-22 07:05:00; layover at CDG: 130 minutes.
- AF1528: CDG 2026-12-22 09:15:00 → OPO 2026-12-22 10:35:00.
2026-12-21 · one way · $702.00
- United Airlines UA3610 / TP214: BOS 2026-12-21 19:00:00 → OPO 2026-12-22 11:20:00; 1 stop(s) via EWR; 680 minutes. Local airport times.
- UA3610: BOS 2026-12-21 19:00:00 → EWR 2026-12-21 20:32:00; layover at EWR: 188 minutes.
- TP214: EWR 2026-12-21 23:40:00 → OPO 2026-12-22 11:20:00.
2026-12-21 · one way · $715.00
- Delta Air Lines DL5814 / DL138: BOS 2026-12-21 17:05:00 → OPO 2026-12-22 08:15:00; 1 stop(s) via JFK; 610 minutes. Local airport times.
- DL5814: BOS 2026-12-21 17:05:00 → JFK 2026-12-21 18:46:00; layover at JFK: 104 minutes.
- DL138: JFK 2026-12-21 20:30:00 → OPO 2026-12-22 08:15:00.
2026-12-21 · one way · $442.00
- TAP Air Portugal TP216 / TP1926: BOS 2026-12-21 22:20:00 → OPO 2026-12-22 13:30:00; 1 stop(s) via LIS; 610 minutes. Local airport times.
- TP216: BOS 2026-12-21 22:20:00 → LIS 2026-12-22 09:55:00; layover at LIS: 155 minutes.
- TP1926: LIS 2026-12-22 12:30:00 → OPO 2026-12-22 13:30:00.