What is the best day of the week to book a Southwest flight?

If you're looking to book today, you can easily purchase the lowest prices as soon as they become available. While Southwest Airlines ticket prices are already notoriously affordable, searching for your airfare on a Tuesday is a good way to save even more on your upcoming trip.



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Specifically, plane tickets usually don't get cheaper closer to the departure date. Instead, flights tend to be the most inexpensive when you book between four months and three weeks before your departure date.

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40% OFF FARE SALE!! Southwest offers 2 real fare sales every year. One in June for the Mid August thru just before Christmas time period and a second one in August for the period listed above plus about 6 weeks in January and February. This is the June sale.

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Watch for sales (They happen frequently) Southwest has an unofficial but predictable fare sale calendar that drops the prices on some routes nearly every Tuesday. While it's not a published policy, these generally run from Tuesday through Thursday and offer one-way prices on select routes as low as $39.

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Watch for sales (They happen frequently) Southwest has an unofficial but predictable fare sale calendar that drops the prices on some routes nearly every Tuesday. While it's not a published policy, these generally run from Tuesday through Thursday and offer one-way prices on select routes as low as $39.

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It's not only important to know the best day to book flights – you'll also want to get familiar with the worst days to book. Friday and Saturday are the worst times to book a flight if you're trying to save money. ARC's 2023 report noted that Friday is the worst day to book flights, domestic and international.

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More specifically, Tuesday at about 15:00 eastern time. This is because many airlines release weekly sales early on Tuesday, which creates competition between airlines to match prices.

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Tuesday Around Midnight is the Cheapest Time to Book
In general, flights were slightly cheaper at midnight earlier in the week (Monday through Wednesday). However, this is only applicable to about 1.6% of U.S. markets, meaning that it's not likely you'll find the same savings on your specific route.

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Tuesdays and Wednesdays are the cheapest days to fly domestically. The cheapest days to depart if you're flying within the U.S. are midweek — generally Tuesday or Wednesday. For economy tickets, Tuesdays are about 24% lower than peak prices on Sundays, which translates to savings of about $85 per ticket.

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The process is largely controlled by computer software and is increasingly being bolstered by AI, so price changes can happen at any second. That's why there's no specific time of day — or even a specific day of the week, for that matter — that's best for booking cheap flights.

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In the early days of online flight booking, airlines used to manually post their updated prices at a certain time of day each week. This led to the rise of the myth that the cheapest time to book a flight was on Tuesday (and specifically at 3am, many claimed).

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As we've shown, the price of ticket on any one flight will change – and can even change multiple times a day. You simply do not have the time to mull things over and to shop around the Internet indefinitely to “make sure” you're getting the best deal.

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You can find deals any day of the week since flight prices fluctuate with demand. Airlines might offer sales, increase the number of seats on a route or even lower prices to match a competitor, so there's no real pattern in what day of the week has the best deals.

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The process is largely controlled by computer software and is increasingly being bolstered by AI, so price changes can happen at any second. That's why there's no specific time of day — or even a specific day of the week, for that matter — that's best for booking cheap flights.

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For domestic trips, TPG recommends monitoring prices three to four months before your departure date and expecting to book one to two months in advance. For international trips, we recommend starting to monitor prices six to seven months in advance and expect to book three to five months in advance.

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