While Tuesday is the cheapest day to book a flight in general, this is not the case for all airlines. In fact, Sunday is the best day to book a flight with American Airlines, JetBlue, and United Airlines.

While Tuesday is the cheapest day to book a flight in general, this is not the case for all airlines. In fact, Sunday is the best day to book a flight with American Airlines, JetBlue, and United Airlines.

While Tuesday is the cheapest day to book a flight in general, this is not the case for all airlines. In fact, Sunday is the best day to book a flight with American Airlines, JetBlue, and United Airlines.

While Tuesday is the cheapest day to book a flight in general, this is not the case for all airlines. In fact, Sunday is the best day to book a flight with American Airlines, JetBlue, and United Airlines.

While Tuesday is the cheapest day to book a flight in general, this is not the case for all airlines. In fact, Sunday is the best day to book a flight with American Airlines, JetBlue, and United Airlines.

While Tuesday is the cheapest day to book a flight in general, this is not the case for all airlines. In fact, Sunday is the best day to book a flight with American Airlines, JetBlue, and United Airlines.

While Tuesday is the cheapest day to book a flight in general, this is not the case for all airlines. In fact, Sunday is the best day to book a flight with American Airlines, JetBlue, and United Airlines.

While Tuesday is the cheapest day to book a flight in general, this is not the case for all airlines. In fact, Sunday is the best day to book a flight with American Airlines, JetBlue, and United Airlines.

There isn't a single "cheapest day" to book flights anymore. In the past, Tuesdays were often recommended because airlines tended to release sales on Mondays. However, airlines are more flexible with their pricing strategies now.

Here's what you should consider instead:

• Be flexible with your travel dates. This is the biggest factor affecting flight prices. If you can fly during the week (Tuesdays, Wednesdays, and Thursdays) instead of weekends, and during off-peak seasons, you're more likely to find cheaper fares.

• Set price alerts. Many flight search engines and travel websites allow you to set price alerts for specific routes. This way, you'll be notified when the price of a flight you're interested in goes down.

• Book in advance, but not too early. The best time to book a domestic flight is usually 1-3 months in advance, while international flights can be booked 2-8 months in advance. However, there can be deals that pop up outside this window, so it's always a good idea to be flexible.

• Consider flying on budget airlines. Budget airlines typically offer lower fares than traditional airlines, but they may also have fewer amenities and more fees.

• Consider alternative airports. If there are multiple airports in your destination city, compare prices for flying into each one. You may find that a smaller airport is significantly cheaper to fly into.

• Be open to layovers. Non-stop flights are usually the most expensive option. If you're flexible with your travel time, consider flights with one or more layovers. This can save you a significant amount of money.