What time of day does Southwest change prices?

If Southwest doesn't have the lowest price, it may match a competitors' sale price on the same route, and this will usually occur by 3 p.m. eastern time. Hurry, because most sales – Southwest's and other airlines' – usually end by Thursday night. TIP: Southwest has been known to extend fare sales at the last minute.



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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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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 helpful if you can book flights as soon as they are released, but what time is that? Unfortunately, Southwest will not say what TIME on the release date they will release flights, though generally we have found that release times range between 7 a.m. to 10:30 a.m. ET.

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“It all varies, depending on the route you're flying, etc.” That means there isn't one best time to book a flight during the day—and that it's a myth that it's cheapest to book flights at midnight. Save 5% on domestic travel and 10% on international flights.

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Travelers will find there's a window of time up till Tuesday at 3 p.m. Eastern time when Southwest makes an effort to match competitor sale prices, with the majority of sales ending by Thursday night. You might just be pleasantly surprised with some of the last-minute deals you come across within this timeframe.

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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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There is a persistent myth about cheap last minute fares, but that's what it is, a myth. Airline yield management cranks up the prices so that people who have to buy tickets at the last minute, usually business travelers, pay the most.

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In general, same-day flights are cheaper than booking in advance, but it isn't always the case. Sometimes, booking a flight six months in advance might seem like a good idea.

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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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You may not get cheaper airfare by booking on a specific day, but when you plan on flying can affect the price of the ticket. Generally, Mondays and Fridays are more expensive than Tuesdays, Wednesdays and Thursdays. Keyes says this is mainly because business travelers tend to avoid traveling in the middle of the week.

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If you are committed to getting the cheapest airfare possible, what time of the day to buy your ticket also matters. Online research has shown that the answer to when are flights cheapest to book on any given day is around 05:00. So, set the alarm, and get up early for that flight deal.

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Generally, Tuesday, Wednesday and Saturday are the cheapest days to fly, while Fridays and Sundays are pricier, according to travel deal site FareCompare. Leisure travelers tend to fly on the weekends, either starting their vacations on Friday or taking a long weekend Friday to Sunday.

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A well-worn travel legend says that Tuesday is the best (and cheapest) day to book your flight. However, here in the UK at least, it would seem that the myth is exactly that – just a myth. Holiday booking site Opodo says that Sunday is the cheapest day for buying a plane ticket.

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