Who flies it cheapest, and what seat do you get?
Pick your US airport and the European airport you are flying into. Every airline that sold the route in one fixed week, cheapest first, with the routing and, in business, the seat, from 6,690 fares we priced ourselves.
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Boston to London Heathrow (LHR), economy, travel November 8–14, 2026
Cheapest: SAS at $636, via CPH
Cheapest nonstop: Delta at $815, $179 more than the connection.
Every airline that sold it, cheapest first
| Airline | Fare | Above cheapest | Routing |
|---|---|---|---|
| SAS | $636 | cheapest | via CPH |
| Icelandair | $683 | +$47 | via KEF |
| TAP Air Portugal | $778 | +$142 | via LIS |
| Aer Lingus | $794 | +$158 | via DUB |
| Delta | $815 | +$179 | nonstop |
| Virgin Atlantic | $815 | +$179 | nonstop |
| JetBlue | $822 | +$186 | nonstop |
| American | $823 | +$187 | nonstop |
| British Airways | $823 | +$187 | nonstop |
Round trip, one adult, taxes in, bags out, every carrier priced for the same fixed week so the gaps are between airlines and nothing else. Collected September 1, 2026; a benchmark for judging a quote, not a bookable price.
What this is, and what it is not
Every fare-comparison site shows you today’s prices for your dates, which is the right tool for booking and the wrong one for understanding a route. This shows you the whole market for one route on one fixed week: 6,690 fares across 888 economy and 884 business routes, the entire cross-product of 26 US gateways and 47 European airports, collected so that no two fares in a comparison come from different weeks.
That is what lets it say things a search engine cannot. That the cheapest way from Boston to Heathrow was SAS through Copenhagen, and every nonstop cost $179 or more above it. That Delta and Virgin Atlantic quoted the same fare to the dollar, because a joint venture is one seller. That the cheapest business fare on many routes buys a recliner, and the cheapest bed costs several hundred dollars more. None of that is visible on a booking screen for one date.
How to use it
Search your dates wherever you normally do, then check the route here. If the airline quoting you the lowest fare was also the cheapest in our week, you are probably looking at the floor for that route. If a carrier in our table sold it for much less than what you are seeing, that is the one to search directly. And if the nonstop premium is small on your route, take the nonstop; on most it is not, and this tells you which kind of route you are on.
What it cannot tell you
It prices one week, November 8–14, 2026, collected September 1, 2026. Fares move, seasonal routes come and go, and a carrier that was cheapest in November may not be in June. The multiples and gaps are far more stable than the dollar figures, which is why the tool leads with the gap. It does not include bag fees, and it does not know your dates. The written analysis of the whole grid is on The Best Airlines to Fly to Europe, and the aggregates per airline are downloadable on the open data page.
This tells you who was cheapest on your route in one week. Catching the week the fare drops is the other half, and it needs someone watching the route.
Common questions
- Why is every fare for the same week?
- Because that is the only way two airlines can be compared. Our city grid takes the cheapest week per destination, which answers what a city costs but not which airline is cheaper, since two carriers might be quoting different weeks. Every fare here is for travel November 8–14, 2026, collected route by route with every carrier on a route captured in one session, so the gap between two rows is a gap between two airlines and nothing else.
- Why is a connection usually cheaper than the nonstop?
- Because the connecting European carriers, above all Icelandair, SAS and TAP, sell your city as feed for their hubs and price it to fill the plane, while the nonstop is sold by one or two carriers, often joint-venture partners charging the same fare to the dollar. Across the grid a connection beat the nonstop on more than 95 percent of routes in both cabins. The tool shows the premium the nonstop costs so you can decide whether the hours are worth it.
- What does the seat column mean?
- In business, the score of the carrier's best verified aircraft on our published rubric: five points for a lie-flat bed, three for direct aisle access from every seat, two for a privacy door. A score under five is a recliner, however the airline names it. Where a carrier flies more than one product on US to Europe routes, it is flagged, because the aircraft on your date decides what you get.
- Why does my route say no airline returned an itinerary?
- We planned every pair of 26 US gateways and 47 European airports and searched all of them for the same week. Where no single carrier returned an itinerary at any price, the route is recorded as unpriced rather than left out or filled with a guess. It usually means the route is seasonal, or served only on separate tickets. Salt Lake City alone accounts for 31 of those pairs, which is a finding about that market, not a collection gap.
- Are these bookable prices?
- No. They are the fares each carrier quoted for one fixed week, collected on September 1, 2026, and they exist to show which airline was cheapest on your route and by how much. Use them to judge the quote in front of you, not to expect the same number.
Written by
Jon Miksis
Jon Miksis has run travel businesses since 2017 and spends 3–6 months a year traveling, two to three of them in Europe. He has taken 250+ flights and booked every one himself, and regularly flies Boston to Europe for under $300 round trip. Every “Flown” review is from his own seat.
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