The cheapest order to fly Dublin, Edinburgh and London from Boston
There are 6 ways to fly these cities, and 4 of them can be priced from fares we have seen. They do not cost the same. The cheapest works out at about $718 a person and the most expensive at $1,052, a difference of $334 for visiting exactly the same places.
Fly them in this order
Boston → London → Edinburgh → Dublin → Boston
About $718 per person in flights, based on fares recently seen on these routes, and the cheapest of the 4 ways round we could price.
The 4 we can price
- Boston → London → Edinburgh → Dublin → Boston$718cheapest order
- Boston → London → Dublin → Edinburgh → Boston$865$147 more per person
- Boston → Dublin → Edinburgh → London → Boston$936$218 more per person
- Boston → Dublin → London → Edinburgh → Boston$1,052$334 more per person
Why London first
- Boston to London$269
- London to Edinburgh$21
- Edinburgh to Dublin$28
- Dublin to Boston$400
- Out of Boston, London is the cheapest first stop at about $269. Dublin would be $460.
- Going home, Dublin is the cheapest city to leave from at about $400, against $553 from Edinburgh.
- The dearest order pays $553 for Edinburgh to Boston, a flight the cheapest order never takes.
- Dublin to Boston is 56% of what the cheapest order spends on flights, so it is the leg to watch.
Between the cities
- London to Edinburgh: about 530 km (330 miles) as the crow flies. Also by ground: LNER / Avanti, about 4h 30m, usually $40 to $150.
- Edinburgh to Dublin: about 350 km (220 miles) as the crow flies. No train or bus we would suggest instead of flying.
Entry rules on a US passport
- US passport: the UK requires an Electronic Travel Authorisation (ETA) for visa-free visitors, including short visits and landside transit. Apply via the UK ETA app before travel. Official source
Rules change; check the official source for your passport and dates before you book.
What these numbers are
Cached one-way fares, 11 of 12 legs priced from real observations, put together on September 24, 2026, from fares departing September 25, 2026 onwards. Right for comparing one order with another, not a quote for your dates.
A plan prices your own dates and weighs hours as well as fares, so it can pick a different order from this page.
Put dates on it
Same cities on real dates, plus what one search cannot show: layovers long enough to count as a free city, two tickets that beat one, and cheaper days either side. No account and no card.
One press starts it on January 2, 2027 to January 16, 2027, 14 days, for 2 travelers. Our dates, not yours, and about two minutes.
Plan Dublin, Edinburgh and London from Boston nowOpen the form instead and pick your own datesSigned out, 3 plans a day per address, priced from cached fares and the free sources, so some legs may be estimates and the plan says which. Signed in, legs are checked live, with 2 free trips you can change afterwards.