Your next trip, last seen at €286
Below averageWhen to fly
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Find the dates that work for you
The lowest fare we observed for each month. Open a month to see its days, then pick your outbound and return. A day with no price is one we will search for you.
One-way fare
- Lowest observed
- €286, departing 20 Jan 2027 (Last checked: 18 Oct 2026)One-way fare · Priced departure days checked in the last 14 days: 87Check live prices for this route
- Airlines seen
- Aer Lingus, Icelandair, JetBlue, Ryanair, TAP Air Portugal, United Airlines, Virgin Atlantic (7)
- Reported fastest flight
- 5h 55m
- Non-stop
- Yes
About this route
Explore the fares we observed from Boston to Shannon. Prices move often, so pick your dates to see the latest options.
- Route distance
- 4,651 km
- Reported fastest flight
- 5h 55m
- Airlines seen
- Aer Lingus, Icelandair, JetBlue, Ryanair, TAP Air Portugal, United Airlines, Virgin Atlantic (7)
- Alternative airports
- PSM
Route-level information; individual journeys vary.
Published schedules report non-stop service with Aer Lingus. Check current timetables.
A clearer picture of your fare
Non-stop airlines seen on this route
| Airline | Non-stop days / priced days | Fastest non-stop |
|---|---|---|
| Aer Lingus | 13 / 87 |
Departure days with a non-stop fare checked in the last 14 days. A carrier listed here had a non-stop fare on at least 3 days; schedules may differ.
Airport to city: straight-line distance
- Portsmouth International Airport at Pease (PSM) → Boston, city gazetteer reference point (42.3584, -71.0598): ≈ 82 km.
- Shannon Airport (SNN) → Shannon, city gazetteer reference point (52.6925, -8.9204): ≈ 1 km.
Approximate distances calculated from coordinates, not road distances or travel times. These airports serve the city; they are not confirmed endpoints of an offer.
Lowest fare by departure month
| Month | Lowest fare | Priced days |
|---|---|---|
| October 2026 | €231 | 12 |
| November 2026 | €202 | 30 |
| December 2026 | €204 | 25 |
| January 2027 | €205 | 17 |
Lowest fare by day of the week
Cheapest day of the week from Boston to Shannon: Monday, from €202 (checked 16 Oct 2026).
| Day | Lowest fare | Priced days |
|---|---|---|
| Monday | €202 | 11 |
| Tuesday | €202 | 12 |
| Wednesday | €202 | 16 |
| Thursday | €204 | 12 |
| Friday | €202 | 12 |
| Saturday | €205 | 12 |
| Sunday | €203 | 12 |
One-way fares checked in the last 14 days. Each figure is the lowest priced departure day we saw, not a guaranteed fare.
Lowest fare by days before departure
Lowest fare from Boston to Shannon by days until departure (8 to 30 days): €202 (checked 16 Oct 2026).
| Days before departure | Lowest fare | Priced days |
|---|---|---|
| 0 to 7 days | €231 | 8 |
| 8 to 30 days | €202 | 23 |
| 31 to 60 days | €202 | 28 |
| 61 days or more | €205 | 28 |
One-way fares checked in the last 14 days. Each figure is the lowest stored fare for that distance to departure, not a price forecast.
Fares for different departure dates, checked now; not a guide to when to book.
Lowest one-way fare we saw per airline
Cheapest airline from Boston to Shannon: Aer Lingus, from €202 (checked 16 Oct 2026).
| Airline | Lowest fare | Priced days |
|---|---|---|
| Aer Lingus | €202Nov 10, 2026 | 64 |
| Ryanair | €204Nov 24, 2026 | 10 |
| TAP Air Portugal | €277Nov 1, 2026 | 6 |
| JetBlue | €291Oct 21, 2026 | 3 |
One-way fares checked in the last 14 days. An airline listed here had a fare on at least 3 departure days. Each figure is the lowest we saw, not a guaranteed fare. Connecting itineraries are included; the date is the departure day of that fare.
Frequently asked
How much is a flight from Boston to Shannon?
The lowest fare we have observed is €286, found on 18 Oct 2026. Prices move, so read it as a floor rather than a quote.
When is the cheapest month to fly from Boston to Shannon?
In our observations January 2027 is the cheapest month so far, at €286.
Are there direct flights from Boston to Shannon?
Yes. Published schedules report non-stop flights on this route with Aer Lingus.
Which airlines fly from Boston to Shannon?
These are the carriers we have seen on the route: Aer Lingus, Icelandair, JetBlue, Ryanair, TAP Air Portugal, United Airlines, Virgin Atlantic (7).
How long does the flight from Boston to Shannon take?
The average journey time across the 85 fares we observed is 24h 34m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.
How many of the observed Boston to Shannon fares were non-stop?
10 of the 85 fares we observed were non-stop; the rest included at least one stop. That describes our observations, not every flight that operates.
Which airlines had non-stop offers on at least 3 departure dates from Boston to Shannon?
For Boston to Shannon, examples of observed one-way non-stop offers checked within the last 14 days: Aer Lingus (13). Each number counts distinct departure dates, not weekly flights; check current availability in search.
Which day of the week is cheapest from Boston to Shannon?
Cheapest day of the week from Boston to Shannon: Monday, from €202 (checked 16 Oct 2026).
Which airline has the lowest fare from Boston to Shannon?
Cheapest airline from Boston to Shannon: Aer Lingus, from €202 (checked 16 Oct 2026).
How observed prices work, what "No data" means and what a fare includes: Read the flight price guide
Keep exploring
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Recently observed fares. Prices may change.
Last checked: 19 Oct 2026