Today's drop ·
Cheap flights from Boston to Madrid
$438 round trip right now, 20% under the $550 this route usually costs.
How cheap is this?
Telly prices every departure date six months out on this route, for trips of 2 to 14 nights, and measures each fare against what the route usually costs. The cheapest round trip right now is $438 on TAP Portugal, 1 stop, against a usual $550. 20% below the usual fare.
When to go
The cheapest dates fall in Dec–Mar, for trips of 2 to 4 nights. Dec in Madrid runs around 43°. The dates come picked because a cheap fare only exists on certain days; the exact ones and the booking link are in the app.
Passport required
Madrid is outside the US and Canada, so you need a passport. Every flight on Telly leaves the country; that is the whole filter.
Questions about this route
How much is a flight from Boston to Madrid?+
Right now $438 round trip, on TAP Portugal. The route usually costs $550, so this fare is 20% under. Checked Nov 4, 2026.
When are the cheapest dates to fly to Madrid?+
The cheapest dates Telly found are in Dec–Mar, for trips of 2 to 4 nights. It prices every departure date six months out on this route and keeps only the lowest. The exact dates are in the app.
Do I need a passport to fly from Boston to Madrid?+
Yes. Madrid is outside the US and Canada, and every flight on Telly leaves the country, so every one needs a passport.
