Midweek departures — Tuesday and Wednesday — are reliably the cheapest, typically running 5–8% below a route's usual round-trip price, while Sunday departures run several percent above it. The figures below are from our live fare data, refreshed continuously.
Every departure day, compared fairly
Comparing raw averages by day is misleading — cheap routes happen to fly on different days than expensive ones. So we normalize: every fare is compared to its own route's typical (median) price, and only then do we group by departure day. What's left is the pure day-of-week effect.
Why midweek departures are cheaper
- Weekend trips bookend the week. Leisure travelers leave Thursday–Saturday and come back Sunday–Monday, so demand — and price — peaks at the edges.
- Business travel leaves Monday. Midweek departures sit in the trough between the two waves.
- Airlines price the departure, not the route. The same plane on Tuesday simply has more empty seats to fill.
A tendency, not a law
This is a statistical edge, not a guarantee — a quiet Sunday beats a holiday Tuesday every time. The day-of-week effect is also smaller than the week-to-week swing on most routes, which is why the bigger win is searching a flexible window and letting the cheap dates surface, whatever day they land on. (More on that in why searching multiple weekends finds cheaper flights.)
How to actually use this
- Search a window, not a date. Pick "Flexible" and give it a few weeks of room.
- If your trip allows it, prefer a midweek departure. In the advanced options you can restrict departure days — try Tuesday/Wednesday and compare.
- Let the ranking decide. We price every date combination in your window and sort cheapest-first, so a cheap Saturday will still beat an average Tuesday.
- Search flexible dates from your airport — every departure day in your window, priced and ranked.
- Find Deals from your airport — the nonstop round-trips currently below their route's typical price.
The cheapest day of the week is real, but it's a few percent. The cheapest week is where the real money is — search the window and take both.