When flights are cheaper: what the data shows and what’s just a myth

Checked in November 2026. Published studies focus on major markets. I couldn’t find a reliable study for Moldova and Romania, so treat the figures below as a guide.

What the data shows

Google Flights published a five-year analysis in October 2026. Note that it covers departures from the US only:
- The lowest average fares: 39 days before departure for domestic flights and 89 days for international flights.
- For flights to Europe: around 90 days ahead, with savings starting at 49 days.
- Booking on Wednesday instead of Sunday saves only about 1.4%.
- Flying out on Monday and returning on Tuesday or Wednesday costs about 14% less than flying at the weekend.
- Non-stop flights are about 20% more expensive than flights with a layover.

Expedia found in 2026 that the cheapest day varies by country, and the savings are 2-3%.

The myths

• “Book on a Tuesday”: the difference is too small to matter.
• “Early morning is cheaper”: I couldn’t find reliable evidence.
• “Incognito mode lowers prices”: I couldn’t find reliable evidence for this either.

What actually works

• Be flexible about your departure date. This saves more than any other trick.
• Open the price calendar: on allvigo, you can see the lowest fare found under each date.
• Try nearby airports. Sometimes a few hours on the road costs less than the fare difference.
• Compare non-stop flights with connecting flights, but factor in the extra time too.
• Compare the total price, including baggage. A cheap ticket without baggage can end up costing more.
• For international flights, start looking a few months ahead.

If you’ve found a good fare for your dates, don’t wait for a miracle. It could just as easily go up.