The Quran names the traveller, alongside the sick, as someone who can pause the fast and make the days up later, any time before the next Ramadan (Quran 2:185). The concession is a kindness, and the Prophet took it himself on journeys. Most schools set the qualifying distance around a day's journey (commonly about 80 km) with a stay short enough that you are not settled. A fast kept while travelling remains valid for most scholars, and is fine when it doesn't strain you; when the road is hard, breaking it is better.
what counts as travelling? Schools differ
Most schools set the bar around a day's journey (commonly about 80 km) and a stay short enough that you are not settled. The details differ between schools, so check how yours counts it.
if you choose to fast anyway
A fast kept while travelling is valid for most scholars, and fine when it doesn't strain you. If the trip is hard (long segments, heat, little sleep), breaking it is better.
where this comes from
views of the schools
All four schools agree the traveller may break the fast and make up the days later.
Mainstream views shown fairly; we never rule one school correct.
Sources
AlAnswer curates and links established scholarship; we do not issue original rulings. Read the full sources for complete context. General education, not a personal ruling. For your specific situation, ask a local scholar.
people also ask
When do I make up the missed days?
Any time before the next Ramadan, together or spread out. If a valid excuse continues, scholars discuss what follows; ask locally.
Does a short commute count as travel?
No. Daily commuting within your city is not the travel the concession means, by agreement.
What about breaking a fast mid-journey?
If travel begins during a fasting day, most schools say complete that day; the Hanbalis allow breaking once travel truly begins.