DL125 from Lisbon to Boston, tracked live

DL125 distance and great-circle path

DL125 covers 5,125 km, or 3,184 miles. That makes it a long-haul flight, a widebody route with a full night's flying time. Of the 439 routes we track, it ranks 227 by distance.

Lisbon to Boston is 5,125 km (3,184 miles) on an initial heading of 295°, which is broadly north-west. Watches move 4 hours back between the two gates. It links Portugal with United States.

Our guide explains how the LIS-BOS route appears on a tracker map.

Can the Airbus A330-900neo comfortably fly DL125?

Not at all. At roughly 38% of its range, this is an easy trip for an Airbus A330-900neo. The airline picked it for cabin size, not distance. The full numbers are on our aircraft page for the Airbus A330-900neo.

What to know about DL125

• Time change: you land 4 hours behind the time you left.

What flying LIS to BOS takes

It is a long-haul sector, a widebody route with a full night's flying time. Delta Air Lines needs a widebody twinjet: the sector needs long-range tanks and a cabin crew rest provision, which rules out most single-aisle types. Westbound, this route pushes into the prevailing winds aloft, which is why the eastbound leg is normally the quicker one. In daylight the sun sits on the left (south-facing) side of the cabin for most of the crossing.

How we verified this

The origin and destination on this page are the ones we verified for callsign DAL125 through adsbdb, not a schedule copied from elsewhere. We have logged it airborne on 38 days between 2026-09-19 and 2026-10-29. Across 4 recorded legs the typical departure falls around 12:00 UTC. Timings are observations, not an official operational status: always confirm with the airline before travelling.

This page was published from our own tracking record rather than a third-party schedule feed, so it grows as we see the flight again. The seven-day log below is the raw version of the same evidence.

We track 2 scheduled services between Lisbon and Boston, split between Delta Air Lines and TAP Air Portugal. Among them, it is the only one flown with an Airbus A330-900neo.

Measured against DL125:

• TP217 (TAP Air Portugal) runs the same pairing, on an Airbus A321LR.

Block time is gate to gate, so it counts taxi at both ends. That is why two flights covering identical distance rarely share a scheduled duration.

Our database contains 8 observations of DL125 across 8 UTC dates in this window, most recently 2026-10-29. Those records contain 6 distinct transponder addresses. The most frequently resolved route was LIS-BOS (8 records).

The median recorded visibility was 420 minutes. That is time inside receiver coverage, not airborne duration or an on-time-performance measurement.