Tool
Will Your Downloads Still Play On The Plane
A download runs on two clocks: a storage clock that starts when the file lands, and a shorter playback clock that only starts when you first press play. Only one major service publishes both numbers, so this plans around what is documented and gives the safe rule where nothing is.
Take-off, or whenever you lose a usable connection. Nothing is sent anywhere; this runs in your browser.
A long-haul flight, a week off-grid, or however long before a usable connection.
Pick a time and at least one service, and the plan appears here.
How this works, in full
A download is not a copy. It is an encrypted file paired with a licence, and the licence has conditions the file itself gives no sign of. Two separate clocks run on it.
The two clocks
The storage clock starts when the download completes. It is the outer limit on how long the file stays playable without checking in, and it runs whether or not you ever open the file.
The playback clock is shorter and does not start until you press play for the first time. Once started it runs continuously, including while the device is off.
The second one is what catches people, because pressing play to check that a download worked is exactly what starts it. Confirm the download completed in the app instead. That is visible without playing anything.
What each service actually publishes
This is the awkward part, and it is why the planner refuses to give you a countdown for most services. Ask four large services how long a download lasts and only one answers both halves of the question.
| Service | Unwatched download expires after | Once you press play |
|---|---|---|
| HBO Max | 30 days, or when the title leaves the service | 48 hours |
| Apple TV app | Up to 30 days, and only for Apple TV channels | No figure published |
| Netflix | An expiry exists, with no period attached to it | No figure published, and the page implies none applies |
| Prime Video | Nothing published | Nothing published |
Netflix is the one most often assumed to run a 48 hour rule, and its own expiry page says the opposite. A download can be watched as many times as you like before it expires, so pressing play does not start a shorter clock there. Netflix also notes that some titles cap how many times they can be downloaded or renewed at all, set by the licence rather than by Netflix, which is part of why no single number gets published.
The rule that works regardless
Download as late as the connection allows, and do not press play to test it. Renewing a licence needs a connection, which is no help at 30,000 feet, and a title that has left the catalogue cannot be renewed or downloaded again at all.
Questions people ask
- How long does a Netflix download last?
- Netflix does not publish a figure. Its own expiry page says a download lasts "a certain amount of time" and that some titles limit how many times they can be downloaded at all, set by the licence rather than by Netflix. It also indicates that pressing play does not start a shorter clock.
- Does pressing play start a second timer?
- On some services, yes. HBO Max publishes 48 hours once you press play, alongside a 30 day storage limit. That is why checking a download works by playing it is the thing most likely to cost you the download.
- When should I download for a flight?
- As close to departure as the connection allows, and without pressing play to test it. Verify the download completed rather than playing it, because completion is visible in the app and starting playback may start the shorter clock.
- Can a download expire even if I never watch it?
- Yes. The storage clock runs from the moment the file finishes downloading, and it runs whether or not the file is ever opened. A title leaving the catalogue can also end a download early.