In the ever-evolving world of air travel, the question of when to book flights to secure the best deals is a perennial one. With numerous studies and theories emerging each year, let's delve into the best day to book flights in 2018, armed with the latest data and expert insights.
Understanding Flight Pricing Dynamics
Before we dive into the specifics of 2018, it's crucial to grasp the fundamentals of flight pricing. Airline ticket prices are influenced by a multitude of factors, including demand, time of booking, day of the week, and even the time of day. Understanding these dynamics can help you make informed decisions and save substantial amounts on your airfare.
Demand and Seasonality
Airline tickets are typically more expensive during peak travel seasons, such as summer holidays or major events. Conversely, traveling during the off-peak season or shoulder months (the period between peak and off-peak) can yield significant savings. Additionally, flying mid-week, especially on Tuesdays and Wednesdays, tends to be cheaper than weekend flights due to lower demand.

Best Day to Book Flights in 2018: The Data
Now, let's explore the best day to book flights in 2018, based on data from leading travel search engines and meta-analysis of various studies.
Cheapest Days to Book in 2018
According to a study by Skyscanner, the cheapest days to book flights in 2018 were Tuesdays and Wednesdays. The study found that flights booked on these days were, on average, 15% cheaper than the daily average. Moreover, the cheapest months to book were February and September, with an average saving of 6% on flight prices.
Best Time to Book for Domestic and International Flights
A study by Hopper revealed that the best time to book domestic flights in 2018 was 21 days before departure, while for international flights, the sweet spot was 70 days in advance. However, these timelines can vary depending on the destination and time of year.

Other Factors to Consider When Booking Flights
While the day of the week and time of booking can significantly impact airfare prices, other factors can also influence your decision:
- Airline and route: Different airlines and routes may have varying pricing strategies. It's worth comparing prices across multiple airlines and routes to find the best deal.
- Time of day: Early morning and late-night flights, often referred to as "red-eye" flights, tend to be cheaper than flights during peak hours.
- Travel duration: The longer your trip, the more likely you are to find a good deal by booking in advance. However, for shorter trips, prices may not drop significantly until closer to the departure date.
In conclusion, the best day to book flights in 2018 appears to be a Tuesday or Wednesday, with February and September being the cheapest months to book. However, it's essential to consider other factors and remain flexible with your travel plans to secure the best possible deal. By staying informed and using the right tools, you can make the most of your travel budget in 2018.