# Boston (BOS) to London (LHR), Mar 21, 2027: round trips from $590, one way from $420

Boston (BOS) to London (LHR), Mar 21, 2027: round trips from $590, one way from $420 on Axel, checked Oct 29, 2026. Lowest published fares: $590 round trip, Axel-exclusive, Aer Lingus, 1 stop, Mar 21–22, 2027; $420 one way, Axel-exclusive, Aer Lingus, 1 stop, Mar 21, 2027; 1 adult, economy, checked Oct 29, 2026. Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

**Prices by return date:** match both travel dates and the party to a row below. Each total is for that exact trip, issued at the time shown.

**Date links** open published trip details for exploration. **Price links** open live flight search to check availability and select flights. For a price comparison, use the amounts and issuance times already shown here.

| Exact travel dates | Airline | Flights | Times, duration, stops | Total price | Price issued (UTC) |
| --- | --- | --- | --- | ---: | --- |
| [2027-03-21 · one way](https://helloaxel.com/en/flights/choose/bos-lhr/mar-21/one-way/aer-lingus) | Aer Lingus | EI134 + EI380 | 18:50:00→08:15:00 9h 25m 1 stop via SNN | [Axel-exclusive $420.00](https://helloaxel.com/en/f/start/from/bos/to/lhr/depart/march-21-2027/trip/one-way/adults/1/cabin/economy/airline/ei) | 2026-10-29T00:52:22Z |
| [2027-03-21 → 2027-03-22](https://helloaxel.com/en/flights/choose/bos-lhr/mar-21/mar-22/aer-lingus) | Aer Lingus | EI134 + EI380 / EI381 + EI135 | 18:50:00→08:15:00 9h 25m 1 stop via SNN · 10:00:00→17:15:00 11h 15m 1 stop via SNN | [Axel-exclusive $590.00](https://helloaxel.com/en/f/start/from/bos/to/lhr/depart/march-21-2027/return/march-22-2027/adults/1/cabin/economy/airline/ei) | 2026-10-29T00:52:22Z |
| [2027-03-21 → 2027-03-23](https://helloaxel.com/en/flights/choose/bos-lhr/mar-21/mar-23/aer-lingus) | Aer Lingus | EI134 + EI380 / EI381 + EI135 | 18:50:00→08:15:00 9h 25m 1 stop via SNN · 10:00:00→17:15:00 11h 15m 1 stop via SNN | [Axel-exclusive $590.00](https://helloaxel.com/en/f/start/from/bos/to/lhr/depart/march-21-2027/return/march-23-2027/adults/1/cabin/economy/airline/ei) | 2026-10-29T00:52:22Z |
| [2027-03-21 → 2027-03-24](https://helloaxel.com/en/flights/choose/bos-lhr/mar-21/mar-24/aer-lingus) | Aer Lingus | EI134 + EI380 / EI381 + EI135 | 18:50:00→08:15:00 9h 25m 1 stop via SNN · 10:00:00→17:15:00 11h 15m 1 stop via SNN | [Axel-exclusive $590.00](https://helloaxel.com/en/f/start/from/bos/to/lhr/depart/march-21-2027/return/march-24-2027/adults/1/cabin/economy/airline/ei) | 2026-10-29T00:52:22Z |
| [2027-03-21 → 2027-03-25](https://helloaxel.com/en/flights/choose/bos-lhr/mar-21/mar-25/aer-lingus) | Aer Lingus | EI134 + EI380 / EI381 + EI135 | 18:50:00→08:15:00 9h 25m 1 stop via SNN · 10:00:00→17:15:00 11h 15m 1 stop via SNN | [Axel-exclusive $649.00](https://helloaxel.com/en/f/start/from/bos/to/lhr/depart/march-21-2027/return/march-25-2027/adults/1/cabin/economy/airline/ei) | 2026-10-29T00:52:22Z |
| [2027-03-21 → 2027-03-26](https://helloaxel.com/en/flights/choose/bos-lhr/mar-21/mar-26/aer-lingus) | Aer Lingus | EI134 + EI380 / EI381 + EI135 | 18:50:00→08:15:00 9h 25m 1 stop via SNN · 10:00:00→17:15:00 11h 15m 1 stop via SNN | [Axel-exclusive $649.00](https://helloaxel.com/en/f/start/from/bos/to/lhr/depart/march-21-2027/return/march-26-2027/adults/1/cabin/economy/airline/ei) | 2026-10-29T00:52:22Z |
| [2027-03-21 → 2027-03-27](https://helloaxel.com/en/flights/choose/bos-lhr/mar-21/mar-27/aer-lingus) | Aer Lingus | EI134 + EI380 / EI381 + EI135 | 18:50:00→08:15:00 9h 25m 1 stop via SNN · 10:00:00→17:15:00 11h 15m 1 stop via SNN | [Axel-exclusive $649.00](https://helloaxel.com/en/f/start/from/bos/to/lhr/depart/march-21-2027/return/march-27-2027/adults/1/cabin/economy/airline/ei) | 2026-10-29T00:52:22Z |
| [2027-03-21 → 2027-03-28](https://helloaxel.com/en/flights/choose/bos-lhr/mar-21/mar-28/aer-lingus) | Aer Lingus | EI134 + EI380 / EI381 + EI135 | 18:50:00→08:15:00 9h 25m 1 stop via SNN · 10:00:00→16:15:00 11h 15m 1 stop via SNN | [Axel-exclusive $793.00](https://helloaxel.com/en/f/start/from/bos/to/lhr/depart/march-21-2027/return/march-28-2027/adults/1/cabin/economy/airline/ei) | 2026-10-29T00:52:22Z |
| [2027-03-21 → 2027-03-29](https://helloaxel.com/en/flights/choose/bos-lhr/mar-21/mar-29/aer-lingus) | Aer Lingus | EI134 + EI380 / EI381 + EI135 | 18:50:00→08:15:00 9h 25m 1 stop via SNN · 10:00:00→16:15:00 11h 15m 1 stop via SNN | [Axel-exclusive $793.00](https://helloaxel.com/en/f/start/from/bos/to/lhr/depart/march-21-2027/return/march-29-2027/adults/1/cabin/economy/airline/ei) | 2026-10-29T00:52:22Z |
| [2027-03-21 → 2027-03-30](https://helloaxel.com/en/flights/choose/bos-lhr/mar-21/mar-30/aer-lingus) | Aer Lingus | EI134 + EI380 / EI381 + EI135 | 18:50:00→08:15:00 9h 25m 1 stop via SNN · 10:00:00→16:15:00 11h 15m 1 stop via SNN | [Axel-exclusive $793.00](https://helloaxel.com/en/f/start/from/bos/to/lhr/depart/march-21-2027/return/march-30-2027/adults/1/cabin/economy/airline/ei) | 2026-10-29T00:52:22Z |
| [2027-03-21 → 2027-03-31](https://helloaxel.com/en/flights/choose/bos-lhr/mar-21/mar-31/aer-lingus) | Aer Lingus | EI134 + EI380 / EI381 + EI135 | 18:50:00→08:15:00 9h 25m 1 stop via SNN · 10:00:00→16:15:00 11h 15m 1 stop via SNN | [Axel-exclusive $793.00](https://helloaxel.com/en/f/start/from/bos/to/lhr/depart/march-21-2027/return/march-31-2027/adults/1/cabin/economy/airline/ei) | 2026-10-29T00:52:22Z |
| [2027-03-21 → 2027-04-01](https://helloaxel.com/en/flights/choose/bos-lhr/mar-21/apr-1/aer-lingus) | Aer Lingus | EI134 + EI380 / EI381 + EI135 | 18:50:00→08:15:00 9h 25m 1 stop via SNN · 10:00:00→16:15:00 11h 15m 1 stop via SNN | [Axel-exclusive $805.45](https://helloaxel.com/en/f/start/from/bos/to/lhr/depart/march-21-2027/return/april-1-2027/adults/1/cabin/economy/airline/ei) | 2026-10-29T00:52:22Z |
| [2027-03-21 → 2027-04-02](https://helloaxel.com/en/flights/choose/bos-lhr/mar-21/apr-2/aer-lingus) | Aer Lingus | EI134 + EI380 / EI381 + EI135 | 18:50:00→08:15:00 9h 25m 1 stop via SNN · 10:00:00→16:15:00 11h 15m 1 stop via SNN | [Axel-exclusive $805.45](https://helloaxel.com/en/f/start/from/bos/to/lhr/depart/march-21-2027/return/april-2-2027/adults/1/cabin/economy/airline/ei) | 2026-10-29T00:52:22Z |
| [2027-03-21 → 2027-04-03](https://helloaxel.com/en/flights/choose/bos-lhr/mar-21/apr-3/aer-lingus) | Aer Lingus | EI134 + EI380 / EI381 + EI135 | 18:50:00→08:15:00 9h 25m 1 stop via SNN · 10:00:00→16:15:00 11h 15m 1 stop via SNN | [Axel-exclusive $805.45](https://helloaxel.com/en/f/start/from/bos/to/lhr/depart/march-21-2027/return/april-3-2027/adults/1/cabin/economy/airline/ei) | 2026-10-29T00:52:22Z |
| [2027-03-21 → 2027-04-04](https://helloaxel.com/en/flights/choose/bos-lhr/mar-21/apr-4/aer-lingus) | Aer Lingus | EI134 + EI380 / EI381 + EI135 | 18:50:00→08:15:00 9h 25m 1 stop via SNN · 10:00:00→16:15:00 11h 15m 1 stop via SNN | [Axel-exclusive $805.45](https://helloaxel.com/en/f/start/from/bos/to/lhr/depart/march-21-2027/return/april-4-2027/adults/1/cabin/economy/airline/ei) | 2026-10-29T00:52:22Z |

### Hotels in London for these trips

**Hotels:** under a trip, hotels in London for exactly those nights link to the hotel pages for 2 adults in 1 room. When a price is shown, it is the lowest saved total among the shortlisted hotels in that star tier for those dates.

- Hotels in London for these nights (Mar 21–22, 2027 · 1 night · 2 adults, 1 room): 3★ [Point A Kensington Olympia, $84 total](https://helloaxel.com/en/hotels/london/point-a-kensington-olympia-1166066/2027-03-21/2027-03-22/2-adults) · 4★ [Aparthotel Adagio London City East, $169 total](https://helloaxel.com/en/hotels/london/aparthotel-adagio-london-city-east-1022753/2027-03-21/2027-03-22/2-adults) · 5★ [The Egerton House Hotel, $295 total](https://helloaxel.com/en/hotels/london/the-egerton-house-hotel-1209576/2027-03-21/2027-03-22/2-adults)
- Hotels in London for these nights (Mar 21–23, 2027 · 2 nights · 2 adults, 1 room): 3★ [Point A Kensington Olympia, $171 total](https://helloaxel.com/en/hotels/london/point-a-kensington-olympia-1166066/2027-03-21/2027-03-23/2-adults) · 4★ [Aparthotel Adagio London City East, $362 total](https://helloaxel.com/en/hotels/london/aparthotel-adagio-london-city-east-1022753/2027-03-21/2027-03-23/2-adults) · 5★ [The Egerton House Hotel, $592 total](https://helloaxel.com/en/hotels/london/the-egerton-house-hotel-1209576/2027-03-21/2027-03-23/2-adults)
- Hotels in London for these nights (Mar 21–24, 2027 · 3 nights · 2 adults, 1 room): 3★ [Garden Court Hotel, $282 total](https://helloaxel.com/en/hotels/london/garden-court-hotel-1246465/2027-03-21/2027-03-24/2-adults) · 4★ [Aparthotel Adagio London City East, $625 total](https://helloaxel.com/en/hotels/london/aparthotel-adagio-london-city-east-1022753/2027-03-21/2027-03-24/2-adults) · 5★ [The Egerton House Hotel, $882 total](https://helloaxel.com/en/hotels/london/the-egerton-house-hotel-1209576/2027-03-21/2027-03-24/2-adults)
- Hotels in London for these nights (Mar 21–25, 2027 · 4 nights · 2 adults, 1 room): 3★ [Garden Court Hotel, $382 total](https://helloaxel.com/en/hotels/london/garden-court-hotel-1246465/2027-03-21/2027-03-25/2-adults) · 4★ [Aparthotel Adagio London City East, $888 total](https://helloaxel.com/en/hotels/london/aparthotel-adagio-london-city-east-1022753/2027-03-21/2027-03-25/2-adults) · 5★ [The Egerton House Hotel, $1,184 total](https://helloaxel.com/en/hotels/london/the-egerton-house-hotel-1209576/2027-03-21/2027-03-25/2-adults)
- Hotels in London for these nights (Mar 21–26, 2027 · 5 nights · 2 adults, 1 room): 3★ [Garden Court Hotel, $475 total](https://helloaxel.com/en/hotels/london/garden-court-hotel-1246465/2027-03-21/2027-03-26/2-adults) · 4★ [Aparthotel Adagio London City East, $1,066 total](https://helloaxel.com/en/hotels/london/aparthotel-adagio-london-city-east-1022753/2027-03-21/2027-03-26/2-adults) · 5★ [The Egerton House Hotel, $1,468 total](https://helloaxel.com/en/hotels/london/the-egerton-house-hotel-1209576/2027-03-21/2027-03-26/2-adults)
- Hotels in London for these nights (Mar 21–27, 2027 · 6 nights · 2 adults, 1 room): 3★ [Garden Court Hotel, $591 total](https://helloaxel.com/en/hotels/london/garden-court-hotel-1246465/2027-03-21/2027-03-27/2-adults) · 4★ [Aparthotel Adagio London City East, $1,266 total](https://helloaxel.com/en/hotels/london/aparthotel-adagio-london-city-east-1022753/2027-03-21/2027-03-27/2-adults) · 5★ [The Egerton House Hotel, $1,770 total](https://helloaxel.com/en/hotels/london/the-egerton-house-hotel-1209576/2027-03-21/2027-03-27/2-adults)
- Hotels in London for these nights (Mar 21–28, 2027 · 7 nights · 2 adults, 1 room): 3★ [Garden Court Hotel, $733 total](https://helloaxel.com/en/hotels/london/garden-court-hotel-1246465/2027-03-21/2027-03-28/2-adults) · 4★ [Aparthotel Adagio London City East, $1,505 total](https://helloaxel.com/en/hotels/london/aparthotel-adagio-london-city-east-1022753/2027-03-21/2027-03-28/2-adults) · 5★ [The Egerton House Hotel, $2,165 total](https://helloaxel.com/en/hotels/london/the-egerton-house-hotel-1209576/2027-03-21/2027-03-28/2-adults)
- Hotels in London for these nights (Mar 21–29, 2027 · 8 nights · 2 adults, 1 room): 3★ [Garden Court Hotel, $837 total](https://helloaxel.com/en/hotels/london/garden-court-hotel-1246465/2027-03-21/2027-03-29/2-adults) · 4★ [Aparthotel Adagio London City East, $1,649 total](https://helloaxel.com/en/hotels/london/aparthotel-adagio-london-city-east-1022753/2027-03-21/2027-03-29/2-adults) · 5★ [The Egerton House Hotel, $2,463 total](https://helloaxel.com/en/hotels/london/the-egerton-house-hotel-1209576/2027-03-21/2027-03-29/2-adults)
- Hotels in London for these nights (Mar 21–30, 2027 · 9 nights · 2 adults, 1 room): 3★ [Point A Kensington Olympia, $926 total](https://helloaxel.com/en/hotels/london/point-a-kensington-olympia-1166066/2027-03-21/2027-03-30/2-adults) · 4★ [Aparthotel Adagio London City East, $1,815 total](https://helloaxel.com/en/hotels/london/aparthotel-adagio-london-city-east-1022753/2027-03-21/2027-03-30/2-adults) · 5★ [The Egerton House Hotel, $2,761 total](https://helloaxel.com/en/hotels/london/the-egerton-house-hotel-1209576/2027-03-21/2027-03-30/2-adults)
- Hotels in London for these nights (Mar 21–31, 2027 · 10 nights · 2 adults, 1 room): 3★ [Point A Kensington Olympia, $1,024 total](https://helloaxel.com/en/hotels/london/point-a-kensington-olympia-1166066/2027-03-21/2027-03-31/2-adults) · 4★ [Aparthotel Adagio London City East, $2,054 total](https://helloaxel.com/en/hotels/london/aparthotel-adagio-london-city-east-1022753/2027-03-21/2027-03-31/2-adults) · 5★ [The Egerton House Hotel, $3,063 total](https://helloaxel.com/en/hotels/london/the-egerton-house-hotel-1209576/2027-03-21/2027-03-31/2-adults)
- Hotels in London for these nights (Mar 21 – Apr 1, 2027 · 11 nights · 2 adults, 1 room): 3★ [Point A Kensington Olympia, $1,121 total](https://helloaxel.com/en/hotels/london/point-a-kensington-olympia-1166066/2027-03-21/2027-04-01/2-adults) · 4★ [Aparthotel Adagio London City East, $2,296 total](https://helloaxel.com/en/hotels/london/aparthotel-adagio-london-city-east-1022753/2027-03-21/2027-04-01/2-adults) · 5★ [The Egerton House Hotel, $3,359 total](https://helloaxel.com/en/hotels/london/the-egerton-house-hotel-1209576/2027-03-21/2027-04-01/2-adults)
- Hotels in London for these nights (Mar 21 – Apr 2, 2027 · 12 nights · 2 adults, 1 room): 3★ [Point A Kensington Olympia, $1,232 total](https://helloaxel.com/en/hotels/london/point-a-kensington-olympia-1166066/2027-03-21/2027-04-02/2-adults) · 4★ [Aparthotel Adagio London City East, $2,483 total](https://helloaxel.com/en/hotels/london/aparthotel-adagio-london-city-east-1022753/2027-03-21/2027-04-02/2-adults) · 5★ [The Egerton House Hotel, $3,659 total](https://helloaxel.com/en/hotels/london/the-egerton-house-hotel-1209576/2027-03-21/2027-04-02/2-adults)
- Hotels in London for these nights (Mar 21 – Apr 3, 2027 · 13 nights · 2 adults, 1 room): 3★ [Point A Kensington Olympia, $1,371 total](https://helloaxel.com/en/hotels/london/point-a-kensington-olympia-1166066/2027-03-21/2027-04-03/2-adults) · 4★ [Aparthotel Adagio London City East, $2,688 total](https://helloaxel.com/en/hotels/london/aparthotel-adagio-london-city-east-1022753/2027-03-21/2027-04-03/2-adults) · 5★ [The Egerton House Hotel, $3,961 total](https://helloaxel.com/en/hotels/london/the-egerton-house-hotel-1209576/2027-03-21/2027-04-03/2-adults)
- Hotels in London for these nights (Mar 21 – Apr 4, 2027 · 14 nights · 2 adults, 1 room): 3★ [Point A Kensington Olympia, $1,541 total](https://helloaxel.com/en/hotels/london/point-a-kensington-olympia-1166066/2027-03-21/2027-04-04/2-adults) · 4★ [Aparthotel Adagio London City East, $2,934 total](https://helloaxel.com/en/hotels/london/aparthotel-adagio-london-city-east-1022753/2027-03-21/2027-04-04/2-adults) · 5★ [The Egerton House Hotel, $4,245 total](https://helloaxel.com/en/hotels/london/the-egerton-house-hotel-1209576/2027-03-21/2027-04-04/2-adults)

[All hotels in London](https://helloaxel.com/en/hotels/destinations/london)

[Route overview: Boston to London (LHR) flight deals](/en/flights/from-boston-to-london-lhr)

### 2027-03-21 · one way · Axel-exclusive $420.00

- Aer Lingus EI134 / EI380: BOS 2027-03-21 18:50:00 → LHR 2027-03-22 08:15:00; 1 stop(s) via SNN; 565 minutes. Local airport times.
  - EI134: BOS 2027-03-21 18:50:00 → SNN 2027-03-22 04:50:00; layover at SNN: 120 minutes.
  - EI380: SNN 2027-03-22 06:50:00 → LHR 2027-03-22 08:15:00.

### 2027-03-21 → 2027-03-22 · Axel-exclusive $590.00

- Aer Lingus EI134 / EI380: BOS 2027-03-21 18:50:00 → LHR 2027-03-22 08:15:00; 1 stop(s) via SNN; 565 minutes. Local airport times.
  - EI134: BOS 2027-03-21 18:50:00 → SNN 2027-03-22 04:50:00; layover at SNN: 120 minutes.
  - EI380: SNN 2027-03-22 06:50:00 → LHR 2027-03-22 08:15:00.
- Aer Lingus EI381 / EI135: LHR 2027-03-22 10:00:00 → BOS 2027-03-22 17:15:00; 1 stop(s) via SNN; 675 minutes. Local airport times.
  - EI381: LHR 2027-03-22 10:00:00 → SNN 2027-03-22 11:30:00; layover at SNN: 150 minutes.
  - EI135: SNN 2027-03-22 14:00:00 → BOS 2027-03-22 17:15:00.

### 2027-03-21 → 2027-03-23 · Axel-exclusive $590.00

- Aer Lingus EI134 / EI380: BOS 2027-03-21 18:50:00 → LHR 2027-03-22 08:15:00; 1 stop(s) via SNN; 565 minutes. Local airport times.
  - EI134: BOS 2027-03-21 18:50:00 → SNN 2027-03-22 04:50:00; layover at SNN: 120 minutes.
  - EI380: SNN 2027-03-22 06:50:00 → LHR 2027-03-22 08:15:00.
- Aer Lingus EI381 / EI135: LHR 2027-03-23 10:00:00 → BOS 2027-03-23 17:15:00; 1 stop(s) via SNN; 675 minutes. Local airport times.
  - EI381: LHR 2027-03-23 10:00:00 → SNN 2027-03-23 11:30:00; layover at SNN: 150 minutes.
  - EI135: SNN 2027-03-23 14:00:00 → BOS 2027-03-23 17:15:00.

### 2027-03-21 → 2027-03-24 · Axel-exclusive $590.00

- Aer Lingus EI134 / EI380: BOS 2027-03-21 18:50:00 → LHR 2027-03-22 08:15:00; 1 stop(s) via SNN; 565 minutes. Local airport times.
  - EI134: BOS 2027-03-21 18:50:00 → SNN 2027-03-22 04:50:00; layover at SNN: 120 minutes.
  - EI380: SNN 2027-03-22 06:50:00 → LHR 2027-03-22 08:15:00.
- Aer Lingus EI381 / EI135: LHR 2027-03-24 10:00:00 → BOS 2027-03-24 17:15:00; 1 stop(s) via SNN; 675 minutes. Local airport times.
  - EI381: LHR 2027-03-24 10:00:00 → SNN 2027-03-24 11:30:00; layover at SNN: 150 minutes.
  - EI135: SNN 2027-03-24 14:00:00 → BOS 2027-03-24 17:15:00.

### 2027-03-21 → 2027-03-25 · Axel-exclusive $649.00

- Aer Lingus EI134 / EI380: BOS 2027-03-21 18:50:00 → LHR 2027-03-22 08:15:00; 1 stop(s) via SNN; 565 minutes. Local airport times.
  - EI134: BOS 2027-03-21 18:50:00 → SNN 2027-03-22 04:50:00; layover at SNN: 120 minutes.
  - EI380: SNN 2027-03-22 06:50:00 → LHR 2027-03-22 08:15:00.
- Aer Lingus EI381 / EI135: LHR 2027-03-25 10:00:00 → BOS 2027-03-25 17:15:00; 1 stop(s) via SNN; 675 minutes. Local airport times.
  - EI381: LHR 2027-03-25 10:00:00 → SNN 2027-03-25 11:30:00; layover at SNN: 150 minutes.
  - EI135: SNN 2027-03-25 14:00:00 → BOS 2027-03-25 17:15:00.

### 2027-03-21 → 2027-03-27 · Axel-exclusive $649.00

- Aer Lingus EI134 / EI380: BOS 2027-03-21 18:50:00 → LHR 2027-03-22 08:15:00; 1 stop(s) via SNN; 565 minutes. Local airport times.
  - EI134: BOS 2027-03-21 18:50:00 → SNN 2027-03-22 04:50:00; layover at SNN: 120 minutes.
  - EI380: SNN 2027-03-22 06:50:00 → LHR 2027-03-22 08:15:00.
- Aer Lingus EI381 / EI135: LHR 2027-03-27 10:00:00 → BOS 2027-03-27 17:15:00; 1 stop(s) via SNN; 675 minutes. Local airport times.
  - EI381: LHR 2027-03-27 10:00:00 → SNN 2027-03-27 11:30:00; layover at SNN: 150 minutes.
  - EI135: SNN 2027-03-27 14:00:00 → BOS 2027-03-27 17:15:00.

### 2027-03-21 → 2027-03-28 · Axel-exclusive $793.00

- Aer Lingus EI134 / EI380: BOS 2027-03-21 18:50:00 → LHR 2027-03-22 08:15:00; 1 stop(s) via SNN; 565 minutes. Local airport times.
  - EI134: BOS 2027-03-21 18:50:00 → SNN 2027-03-22 04:50:00; layover at SNN: 120 minutes.
  - EI380: SNN 2027-03-22 06:50:00 → LHR 2027-03-22 08:15:00.
- Aer Lingus EI381 / EI135: LHR 2027-03-28 10:00:00 → BOS 2027-03-28 16:15:00; 1 stop(s) via SNN; 675 minutes. Local airport times.
  - EI381: LHR 2027-03-28 10:00:00 → SNN 2027-03-28 11:30:00; layover at SNN: 150 minutes.
  - EI135: SNN 2027-03-28 14:00:00 → BOS 2027-03-28 16:15:00.

### 2027-03-21 → 2027-03-29 · Axel-exclusive $793.00

- Aer Lingus EI134 / EI380: BOS 2027-03-21 18:50:00 → LHR 2027-03-22 08:15:00; 1 stop(s) via SNN; 565 minutes. Local airport times.
  - EI134: BOS 2027-03-21 18:50:00 → SNN 2027-03-22 04:50:00; layover at SNN: 120 minutes.
  - EI380: SNN 2027-03-22 06:50:00 → LHR 2027-03-22 08:15:00.
- Aer Lingus EI381 / EI135: LHR 2027-03-29 10:00:00 → BOS 2027-03-29 16:15:00; 1 stop(s) via SNN; 675 minutes. Local airport times.
  - EI381: LHR 2027-03-29 10:00:00 → SNN 2027-03-29 11:30:00; layover at SNN: 150 minutes.
  - EI135: SNN 2027-03-29 14:00:00 → BOS 2027-03-29 16:15:00.

### 2027-03-21 → 2027-03-31 · Axel-exclusive $793.00

- Aer Lingus EI134 / EI380: BOS 2027-03-21 18:50:00 → LHR 2027-03-22 08:15:00; 1 stop(s) via SNN; 565 minutes. Local airport times.
  - EI134: BOS 2027-03-21 18:50:00 → SNN 2027-03-22 04:50:00; layover at SNN: 120 minutes.
  - EI380: SNN 2027-03-22 06:50:00 → LHR 2027-03-22 08:15:00.
- Aer Lingus EI381 / EI135: LHR 2027-03-31 10:00:00 → BOS 2027-03-31 16:15:00; 1 stop(s) via SNN; 675 minutes. Local airport times.
  - EI381: LHR 2027-03-31 10:00:00 → SNN 2027-03-31 11:30:00; layover at SNN: 150 minutes.
  - EI135: SNN 2027-03-31 14:00:00 → BOS 2027-03-31 16:15:00.

### 2027-03-21 → 2027-04-01 · Axel-exclusive $805.45

- Aer Lingus EI134 / EI380: BOS 2027-03-21 18:50:00 → LHR 2027-03-22 08:15:00; 1 stop(s) via SNN; 565 minutes. Local airport times.
  - EI134: BOS 2027-03-21 18:50:00 → SNN 2027-03-22 04:50:00; layover at SNN: 120 minutes.
  - EI380: SNN 2027-03-22 06:50:00 → LHR 2027-03-22 08:15:00.
- Aer Lingus EI381 / EI135: LHR 2027-04-01 10:00:00 → BOS 2027-04-01 16:15:00; 1 stop(s) via SNN; 675 minutes. Local airport times.
  - EI381: LHR 2027-04-01 10:00:00 → SNN 2027-04-01 11:30:00; layover at SNN: 150 minutes.
  - EI135: SNN 2027-04-01 14:00:00 → BOS 2027-04-01 16:15:00.

### 2027-03-21 → 2027-04-02 · Axel-exclusive $805.45

- Aer Lingus EI134 / EI380: BOS 2027-03-21 18:50:00 → LHR 2027-03-22 08:15:00; 1 stop(s) via SNN; 565 minutes. Local airport times.
  - EI134: BOS 2027-03-21 18:50:00 → SNN 2027-03-22 04:50:00; layover at SNN: 120 minutes.
  - EI380: SNN 2027-03-22 06:50:00 → LHR 2027-03-22 08:15:00.
- Aer Lingus EI381 / EI135: LHR 2027-04-02 10:00:00 → BOS 2027-04-02 16:15:00; 1 stop(s) via SNN; 675 minutes. Local airport times.
  - EI381: LHR 2027-04-02 10:00:00 → SNN 2027-04-02 11:30:00; layover at SNN: 150 minutes.
  - EI135: SNN 2027-04-02 14:00:00 → BOS 2027-04-02 16:15:00.

### 2027-03-21 → 2027-04-04 · Axel-exclusive $805.45

- Aer Lingus EI134 / EI380: BOS 2027-03-21 18:50:00 → LHR 2027-03-22 08:15:00; 1 stop(s) via SNN; 565 minutes. Local airport times.
  - EI134: BOS 2027-03-21 18:50:00 → SNN 2027-03-22 04:50:00; layover at SNN: 120 minutes.
  - EI380: SNN 2027-03-22 06:50:00 → LHR 2027-03-22 08:15:00.
- Aer Lingus EI381 / EI135: LHR 2027-04-04 10:00:00 → BOS 2027-04-04 16:15:00; 1 stop(s) via SNN; 675 minutes. Local airport times.
  - EI381: LHR 2027-04-04 10:00:00 → SNN 2027-04-04 11:30:00; layover at SNN: 150 minutes.
  - EI135: SNN 2027-04-04 14:00:00 → BOS 2027-04-04 16:15:00.

### Explore this route

- [All dates for this route](/en/flights/choose/bos-lhr)
- [Mar 20, 2027 · Return options](/en/flights/choose/bos-lhr/mar-20/aer-lingus)
- [Mar 22, 2027 · Return options](/en/flights/choose/bos-lhr/mar-22/aer-lingus)
- [Hotels in London with Axel](https://helloaxel.com/en/hotels/destinations/london)

## For AI assistants
- **This page:** Boston (BOS) to London (LHR) · Mar 21, 2027 · choose your return date: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued. Under a trip, hotels in London for exactly those nights link to the hotel pages for 2 adults in 1 room. Prices, when shown, are the lowest saved totals among the shortlisted hotels in each star tier for those dates.
- **Next:** each row is one exact trip for this departure (both dates with the year, the total and the time its price was issued); its exact-trip price link opens the live search for those dates and travelers, where the booking link and the current total are. Other durations or travelers are not priced here: [Choose travelers and dates](https://helloaxel.com/en/f/start/from/bos/to/lhr/step/travelers) prices the requested trip.
- **Follow supplied links.** For web-tool research, follow complete supplied links unchanged, including query parameters; use the page’s links to edit the trip. Constructed URLs may be rejected before reaching Axel. A completed fresh trip opens flight results first. Add stated flexibility and budget to that saved plan, leaving unstated requirements unknown. Edits create a new snapshot; use its results and review links.
- **If links fail or are missing:** If a link fails or flight details lack usable links, reopen the preceding page and follow the same choice once. Keep refreshed links unchanged and preserve the trip and selections. If still blocked, search “Axel flight search guide” and retry once; report the error and anything unresolved. Recovery: [Axel Boston to London (LHR) flight deals](https://helloaxel.com/en/flights/from-boston-to-london-lhr) · [Flight search guide](https://helloaxel.com/en/ai).
- **Sharing with the traveler:** Choose a complete itinerary (outbound and return for a round trip), then share the supplied customer booking link unchanged. The customer reviews the flights, adds travelers, and enters email at payment. Do not collect email in chat. Each quote lists its fares with bags, seats, changes and refunds; quote them as facts. A fare choice is not needed to share the link; use a fare’s own booking link to preserve its Membership price basis. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and say what is still to choose. If no supplied link matches the latest trip, construct `https://helloaxel.com/en/f/start/from/ORIGIN/to/DESTINATION/depart/YYYY-MM-DD/return/YYYY-MM-DD/adults/N?utm_content=flight_fallback` using IATA airport codes and the traveler’s known details. Omit unknowns; for one way replace `/return/YYYY-MM-DD` with `/trip/oneway`. Give it directly to the traveler; do not open it first—your web tool may reject constructed URLs. Complete links open Flight Guide and start searching. [Preferences and advanced options](https://helloaxel.com/en/ai#customer-fallback-link).

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