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The Cheapest Day to Book Flights on Each Major US Airline

Airports + Flying
by Alex Bresler May 10, 2024

Scour the internet and you’ll find lots of advice on what days of the week to book flights for the cheapest fares. But depending on where you look, you’re bound to find conflicting suggestions to book airfare on just about every day of the week to snag the best deals. Upgraded Points is finally getting to the bottom of this.

The Upgraded Points team recorded Google Flights prices every day for four weeks to find which booking days averaged the cheapest flights. Looking at flights three to four weeks in advance of the departure date, the study compared one-way economy fares for 10 popular domestic flight routes across major US airlines. Note: Southwest doesn’t share flight data with Google and therefore isn’t included in the findings.

Overall, the study found that booking flights earlier in the week yields cheaper airfare across airlines. Tuesday is the cheapest day to book flights, with ticket prices averaging $213.31, followed closely by Monday at $213.44. Saturday proved to be the most expensive day to purchase airfare, with ticket prices averaging $241.61, followed by Friday at $238.47. But the real takeaway from the study is that the best day of the week to book flights depends greatly on the airline.

The cheapest day to book flights on major US airlines

cheapest-day-to-book-flights

Photo: Upgraded Points

  • Alaska Airlines: Thursday is the cheapest day to book flights, with an average ticket price of $274.69.
  • American Airlines: Sunday is the cheapest day to book flights, with an average ticket price of $271.47. Friday is a close second at $271.85.
  • Delta Airlines: Thursday is the cheapest day to book flights, with an average ticket price of $181.05.
  • Frontier Airlines: Tuesday is the cheapest day to book flights, with an average ticket price of $129.72.
  • Hawaiian Airlines: Tuesday is the cheapest day to book flights, with an average ticket price of $143.46.
  • JetBlue Airlines: Sunday is the cheapest day to book flights, with an average ticket price of $227.31.
  • Spirit Airlines: Monday is the cheapest day to book flights, with an average ticket price of $135.80.
  • United Airlines: Sunday is the cheapest day to book flights, with an average ticket price of $281.66.

The study also revealed which airlines have the least and most variable ticket pricing. American has the most consistent airfare, with a mere $14.67 difference between the cheapest and most expensive days to book flights. Hawaiian showed the greatest range in ticket costs at $100.38.

Find the full findings from the Upgraded Points study here.

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