Expedia released its seventh annual report in partnership with Airlines Reporting Corporation (ARC) revealing travel hacks, including the best time to book airfare, when to travel and other tips to help travellers navigate booking a vacation in 2022.Airfare booking hacks for 2022Based on data from ARC, average ticket prices (ATPs) in early 2021 were still higher than previous years; however, come April there was a decrease. ATPs for both international and domestic flights have since steadily increased but are still on average around 25 per cent lower compared to 2019.1Optimal Booking WindowDomestic flight prices usually start to increase 35 days before departure, while prices for international flights start to increase 28 days before. The sweet spot to book a domestic flight is between 28 – 49 days in advance, while international flights should be booked three to four months in advance for the lowest prices.Ideal day of the week to bookThe ideal day to book a flight is Sunday, not Friday. For domestic flights this can save travellers around 15 per cent and for international flights the savings are almost 10 per cent. Ideal day of the week to travel4The ideal day to start a domestic trip is Friday not Monday, where travellers can save around 25 per cent. For international flights, start the trip on a Saturday, not on a Tuesday to save almost 10 per cent. Best month to travel5Travellers planning their 2022 trips can also unlock huge savings by being flexible and choosing the right month to travel:The ideal month to depart is January versus December. For domestic flights this can save travellers around 15 per cent and almost 30 per cent for international departures.Tickets in Premium economy have never been cheaper. In 2021, premium economy ATPs were 212 per cent more expensive than economy tickets, whereas in 2020 they were 288 per cent more expensive. Pre-pandemic, in 2019 average prices for a premium economy ticket were a huge 304 per cent more expensive than economy.  With a quarter of travellers willing to upgrade their flight if they can afford it*, now would be a good time to splurge and consider upgrading.Accommodation savings tips for 2022While domestic accommodation rates dropped in 2020, prices gradually increased over the past year, and, due to the high demand for domestic travel, are still slightly higher compared to 20197.As travellers continue to plan their future getaways, based on Expedia data, here are some simple tips to unlock savings on accommodation:Ideal day of the week to bookFor domestic holidays, the lowest average daily rate (ADR) for booking accommodation tends to occur on a Tuesday, where travellers could save almost 10 per cent versus booking on the most expensive day, which is a Friday.For international trips, book on a Tuesday, not on a Thursday, to save around 10 per cent.Ideal day of the week to stayThe ideal day to begin a domestic stay is a Tuesday, where travellers can save almost 10 per cent versus staying on a Friday.For international trips, staying on a Tuesday can save travellers around 10 per cent, versus staying on a Thursday.Down-star to saveTravellers can stretch their dollars further by choosing a lower star-rated hotel. Travellers can save around 45 per cent, on average, by simply opting for a 4-star property over a 5-star, while down-starring to a 3-star from a 4-star can save travellers around 30 per cent7.Car RentalRoad trips and exploring destinations closer to home or veering off the beaten track in new places is a trend we’ve seen grow since the beginning of the pandemic. As travellers continue to plan road trips, Expedia’s data indicates the best day to book a car rental is on a Thursday for domestic trips. For travellers exploring international getaways, the cheapest day to book a car is on a Friday. Meanwhile, starting the car rental on a Monday, tends to be the cheapest day for domestic bookings, while Saturday is the best day for international trips.Flexibility is a necessityAs unpredictability associated with the pandemic remains, flexibility will remain a priority for travellers. For just over 30% more, travellers can secure a refundable accommodation rate in case plans need to be changed or cancel providing peace of mind.Source: Expedia