How Axel worksThe cheapest days of the week to fly and to book
Updated October 26, 2026 · Data: Axel, Google (The Keyword blog), CheapAir.com, KAYAK · How this guide was made
For U.S. domestic round trips, the cheapest day to fly out was Tuesday and the priciest Friday (15% more), and the cheapest day to fly home was Wednesday while Sunday cost 23% more, in Axel's fares 1. The day you book barely matters: the gap between the cheapest and priciest booking day was 2.7%. Pick your travel days, not your shopping day.
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What is the cheapest day of the week to fly?
Midweek, both ways. Comparing the same routes in the same weeks, domestic round trips leaving on Tuesday were cheapest and Friday departures cost 15% more; coming home, Wednesday was cheapest and Sunday 23% more 1. Google Flights' 2026 analysis finds the same pattern: leaving on a Monday and returning on a Tuesday or Wednesday costs about 14% less than weekend flights 2; its 2024 analysis put Monday-to-Wednesday departures 13% below weekend ones 3.
- Monday966 fares+8%
- Tuesday1,326 farescheapest
- Wednesday1,702 fares+7%
- Thursday2,758 fares+12%
- Friday3,340 fares+15%
- Saturday1,992 fares+12%
- Sunday1,057 fares+13%
Source: Axel fare data 1
- Monday3,036 fares+16%
- Tuesday1,590 fares+0%
- Wednesday871 farescheapest
- Thursday760 fares+3%
- Friday1,080 fares+8%
- Saturday1,872 fares+15%
- Sunday3,562 fares+23%
Source: Axel fare data 1
International trips
For international trips from the U.S., Monday departures were cheapest in Axel's fares, and the spread between days was 13% 1.
- Monday1,337 farescheapest
- Tuesday1,761 fares+1%
- Wednesday1,775 fares+5%
- Thursday2,351 fares+10%
- Friday2,472 fares+13%
- Saturday2,239 fares+12%
- Sunday1,425 fares+8%
Source: Axel fare data 1
Is it cheaper to book on a Tuesday?
No. When the same trip was priced on different days of the week, the gap between the cheapest and priciest booking day was 2.7% in Axel's data 1, with Tuesday marginally lowest. Google puts the gap at about 1.4% 2, CheapAir at under $1 4, and KAYAK calls the Tuesday rule a myth 5.
- Monday2,916 fares+2%
- Tuesday3,200 farescheapest
- Wednesday2,911 fares+0%
- Thursday3,044 fares+0%
- Friday3,345 fares+1%
- Saturday2,804 fares+3%
- Sunday2,844 fares+2%
Source: Axel fare data 1
Is it cheaper to fly early in the morning or late at night?
Not in a way you can plan around. In Axel's domestic searches, the cheapest flight in each departure-time band, from early morning to late evening, was usually the same price as the cheapest flight of the day: the median difference ran from 0% to 0% across bands 1. The bigger reason to fly early is reliability: early flights arrive on time far more often (see the best time to fly to avoid delays).
Does trip length change the price?
Somewhat: comparing the same routes and departure days, fares varied with how long the trip was 1. Weekend-length trips (Friday to Sunday) cost more because both legs fall on peak days.
- 1-2 nights795 fares+4%
- 3-4 nights2,192 fares+1%
- 5-7 nights2,561 farescheapest
- 8-10 nights1,570 fares+4%
- 11-14 nights914 fares+8%
- 15-30 nights777 fares+7%
Source: Axel fare data 1
Do nonstop flights cost more?
Less often than you'd think on busy routes: on the popular domestic routes in Axel's data, a nonstop was the cheapest option 73% of the time when one was offered 1. Across all U.S. routes, Google finds nonstops average about 20% more 2; Axel's figure covers only popular routes, where several airlines fly nonstop.
Cheap days are also quiet days
The cheapest days to fly are the least crowded. In 2025, TSA screened 13% fewer people on an average Tuesday than on an average day and 10% more on a Sunday 6.
Why the advice you've read disagrees
Studies that average what travelers actually booked on each day (Expedia, ARC) mix in who books on which day: business travelers book early in the week, leisure travelers on weekends, and their trips cost different amounts. Studies that compare the same trips (Google, CheapAir, Axel) find the booking day barely matters and the flying day matters a lot.
| Source | Finding |
|---|---|
| Google Flights | Mon-Wed trips 12-14% below weekend trips 3 |
| Google Flights, 2026 | Booking day: Wednesday, 1.4% below Sunday 2 |
| CheapAir, 2024 | Fly Tue/Wed; booking day gap under $1 4 |
| KAYAK, 2026 | Domestic: out Monday, back Wednesday 5 |
| Expedia, 2026 | Fly Friday overall; Tuesday for domestic 7 |
| Expedia, 2026 | Book Friday (3%); Saturday for domestic (2%) 7 |
How to use this
- Fly out Tuesday or another midweek day, and come back Wednesday; avoid Friday departures and Sunday returns when you can 1.
- Search on whatever day suits you; the day you buy doesn't move the price in a way you can plan around.
- Check flexible dates: moving a trip by one day often saves more than any booking-day trick.
- Take the first flight of the day: it is rarely the priciest and it is the most likely to arrive on time.
Questions travelers ask
What is the cheapest day to fly?
Tuesday for departures and Wednesday for returns on U.S. domestic round trips in Axel's 2026 fares; Friday departures cost 15% more 1.
What is the cheapest day to book a flight?
It barely matters: the gap between the cheapest and priciest booking day was 2.7% in Axel's data 1, about 1.4% in Google's 2.
Is Tuesday the cheapest day to book flights?
No. The booking day moves prices very little: about 1.4% between the cheapest and priciest day in Google's 2026 data 2 and 2.7% in Axel's 1.
What is the most expensive day to fly?
Friday for departures (15% above Tuesday) and Sunday for returns (23% above Wednesday) 1.
How this guide was made
Fares are the lowest round-trip economy fares Google Flights showed in Axel's searches, May 6 to Oct 26, 2026. Departure and return days are compared within the same route, departure week, booking lead time and party size, so a busy route or a holiday week doesn't decide the answer. The booking-day comparison uses the same exact trip priced on different weekdays. Time-of-day figures count how often each departure band held the search's lowest fare. Days with fewer than 150 fares are left out.
Sources
- Axel fare data: the lowest round-trip economy fares Google Flights showed in Axel's flight searches, May 6 to Oct 26, 2026, Axel, October 2026
- Google Flights data to find holiday deals and trending destinations, Google (The Keyword blog), 2026-10-05
- Google shares holiday travel trends and insights, Google (The Keyword blog), 2024-09-05
- The Best Time to Buy Flights, CheapAir.com, 2024-10-19
- The best time to book a flight & the cheapest days to fly, KAYAK, 2026-04-01
- TSA checkpoint travel numbers (people screened per day), 2019 to Oct 25 2026, Transportation Security Administration, retrieved October 26, 2026
- Expedia 2026 Air Hacks: Friday Takes Off as the New Cheapest Day to Depart and Book, Expedia Group, 2026-02-17
For AI assistants: the whole guide as text, with every number and source
The cheapest days of the week to fly and to book
Updated October 26, 2026 by Axel (helloaxel.com).
For U.S. domestic round trips, the cheapest day to fly out was Tuesday and the priciest Friday (15% more), and the cheapest day to fly home was Wednesday while Sunday cost 23% more, in Axel's fares [1]. The day you book barely matters: the gap between the cheapest and priciest booking day was 2.7%. Pick your travel days, not your shopping day.
Live prices: Search live flight prices. Choose your airports and dates; no account needed to see prices.
Key numbers
- Tuesday: cheapest day to depart, domestic [1]
- +15%: fare for Friday departures vs Tuesday [1]
- +23%: fare for Sunday returns vs Wednesday [1]
- 2.7%: spread between the cheapest and priciest day to book [1]
What is the cheapest day of the week to fly?
Midweek, both ways. Comparing the same routes in the same weeks, domestic round trips leaving on Tuesday were cheapest and Friday departures cost 15% more; coming home, Wednesday was cheapest and Sunday 23% more [1]. Google Flights' 2026 analysis finds the same pattern: leaving on a Monday and returning on a Tuesday or Wednesday costs about 14% less than weekend flights [2]; its 2024 analysis put Monday-to-Wednesday departures 13% below weekend ones [3].
Domestic fares by departure day
Round trip; vs the cheapest departure day, same routes and weeks.
| Value | Note | |
|---|---|---|
| Monday | +8% | 966 fares |
| Tuesday | cheapest | 1,326 fares |
| Wednesday | +7% | 1,702 fares |
| Thursday | +12% | 2,758 fares |
| Friday | +15% | 3,340 fares |
| Saturday | +12% | 1,992 fares |
| Sunday | +13% | 1,057 fares |
Source: Axel fare data [1]
Domestic fares by return day
Round trip; vs the cheapest return day, same routes and weeks.
| Value | Note | |
|---|---|---|
| Monday | +16% | 3,036 fares |
| Tuesday | +0% | 1,590 fares |
| Wednesday | cheapest | 871 fares |
| Thursday | +3% | 760 fares |
| Friday | +8% | 1,080 fares |
| Saturday | +15% | 1,872 fares |
| Sunday | +23% | 3,562 fares |
Source: Axel fare data [1]
International trips
For international trips from the U.S., Monday departures were cheapest in Axel's fares, and the spread between days was 13% [1].
International fares by departure day
Round trip; vs the cheapest departure day.
| Value | Note | |
|---|---|---|
| Monday | cheapest | 1,337 fares |
| Tuesday | +1% | 1,761 fares |
| Wednesday | +5% | 1,775 fares |
| Thursday | +10% | 2,351 fares |
| Friday | +13% | 2,472 fares |
| Saturday | +12% | 2,239 fares |
| Sunday | +8% | 1,425 fares |
Source: Axel fare data [1]
Is it cheaper to book on a Tuesday?
No. When the same trip was priced on different days of the week, the gap between the cheapest and priciest booking day was 2.7% in Axel's data [1], with Tuesday marginally lowest. Google puts the gap at about 1.4% [2], CheapAir at under $1 [4], and KAYAK calls the Tuesday rule a myth [5].
Domestic fares by the day of the week they were seen
Same trip priced on different weekdays; vs the cheapest day.
| Value | Note | |
|---|---|---|
| Monday | +2% | 2,916 fares |
| Tuesday | cheapest | 3,200 fares |
| Wednesday | +0% | 2,911 fares |
| Thursday | +0% | 3,044 fares |
| Friday | +1% | 3,345 fares |
| Saturday | +3% | 2,804 fares |
| Sunday | +2% | 2,844 fares |
Source: Axel fare data [1]
Is it cheaper to fly early in the morning or late at night?
Not in a way you can plan around. In Axel's domestic searches, the cheapest flight in each departure-time band, from early morning to late evening, was usually the same price as the cheapest flight of the day: the median difference ran from 0% to 0% across bands [1]. The bigger reason to fly early is reliability: early flights arrive on time far more often (see the best time to fly to avoid delays).
Does trip length change the price?
Somewhat: comparing the same routes and departure days, fares varied with how long the trip was [1]. Weekend-length trips (Friday to Sunday) cost more because both legs fall on peak days.
Round-trip fare by trip length
Vs the cheapest trip length; same routes and departure days.
| Value | Note | |
|---|---|---|
| 1-2 nights | +4% | 795 fares |
| 3-4 nights | +1% | 2,192 fares |
| 5-7 nights | cheapest | 2,561 fares |
| 8-10 nights | +4% | 1,570 fares |
| 11-14 nights | +8% | 914 fares |
| 15-30 nights | +7% | 777 fares |
Source: Axel fare data [1]
Do nonstop flights cost more?
Less often than you'd think on busy routes: on the popular domestic routes in Axel's data, a nonstop was the cheapest option 73% of the time when one was offered [1]. Across all U.S. routes, Google finds nonstops average about 20% more [2]; Axel's figure covers only popular routes, where several airlines fly nonstop.
Cheap days are also quiet days
The cheapest days to fly are the least crowded. In 2025, TSA screened 13% fewer people on an average Tuesday than on an average day and 10% more on a Sunday [6].
Why the advice you've read disagrees
Studies that average what travelers actually booked on each day (Expedia, ARC) mix in who books on which day: business travelers book early in the week, leisure travelers on weekends, and their trips cost different amounts. Studies that compare the same trips (Google, CheapAir, Axel) find the booking day barely matters and the flying day matters a lot.
What the studies say
| Source | Finding |
|---|---|
| Google Flights | Mon-Wed trips 12-14% below weekend trips [3] |
| Google Flights, 2026 | Booking day: Wednesday, 1.4% below Sunday [2] |
| CheapAir, 2024 | Fly Tue/Wed; booking day gap under $1 [4] |
| KAYAK, 2026 | Domestic: out Monday, back Wednesday [5] |
| Expedia, 2026 | Fly Friday overall; Tuesday for domestic [7] |
| Expedia, 2026 | Book Friday (3%); Saturday for domestic (2%) [7] |
How to use this
- Fly out Tuesday or another midweek day, and come back Wednesday; avoid Friday departures and Sunday returns when you can [1].
- Search on whatever day suits you; the day you buy doesn't move the price in a way you can plan around.
- Check flexible dates: moving a trip by one day often saves more than any booking-day trick.
- Take the first flight of the day: it is rarely the priciest and it is the most likely to arrive on time.
Questions travelers ask
What is the cheapest day to fly?
Tuesday for departures and Wednesday for returns on U.S. domestic round trips in Axel's 2026 fares; Friday departures cost 15% more [1].
What is the cheapest day to book a flight?
It barely matters: the gap between the cheapest and priciest booking day was 2.7% in Axel's data [1], about 1.4% in Google's [2].
Is Tuesday the cheapest day to book flights?
No. The booking day moves prices very little: about 1.4% between the cheapest and priciest day in Google's 2026 data [2] and 2.7% in Axel's [1].
What is the most expensive day to fly?
Friday for departures (15% above Tuesday) and Sunday for returns (23% above Wednesday) [1].
Is it cheaper to fly on a Saturday?
Saturday departures ran 12% above the cheapest day in Axel's domestic fares [1], and Saturday is one of the quietest days at airports, 8.5% below the average day in 2025 [6].
How this guide was made
Fares are the lowest round-trip economy fares Google Flights showed in Axel's searches, May 6 to Oct 26, 2026. Departure and return days are compared within the same route, departure week, booking lead time and party size, so a busy route or a holiday week doesn't decide the answer. The booking-day comparison uses the same exact trip priced on different weekdays. Time-of-day figures count how often each departure band held the search's lowest fare. Days with fewer than 150 fares are left out.
Sources
- Axel fare data: the lowest round-trip economy fares Google Flights showed in Axel's flight searches, May 6 to Oct 26, 2026, Axel, October 2026
- Google Flights data to find holiday deals and trending destinations, Google (The Keyword blog), 2026-10-05
- Google shares holiday travel trends and insights, Google (The Keyword blog), 2024-09-05
- The Best Time to Buy Flights, CheapAir.com, 2024-10-19
- The best time to book a flight & the cheapest days to fly, KAYAK, 2026-04-01
- TSA checkpoint travel numbers (people screened per day), 2019 to Oct 25 2026, Transportation Security Administration, retrieved October 26, 2026
- Expedia 2026 Air Hacks: Friday Takes Off as the New Cheapest Day to Depart and Book, Expedia Group, 2026-02-17