Editorial note
Airfare patterns are based on historical booking data, not guaranteed prices. Your route, dates, destination, fare type and demand can matter more than the weekday on which you book.
What Is the Best Time to Book a Flight in 2026?
For U.S. domestic Economy flights, Expedia’s 2026 data found the lowest average prices 15–30 days before departure. For international Economy, booking 31–45 days ahead offered substantial savings compared with purchasing more than six months in advance.
Expedia recorded even lower average international prices 8–15 days before departure, but waiting that late is risky when your dates are fixed, availability is limited or you are travelling during a holiday.
2026 flight-booking summary
| Question | 2026 finding |
|---|---|
| Cheapest day to book overall | Friday |
| Cheapest day to book domestic U.S. flights | Saturday |
| Cheapest domestic departure day | Tuesday |
| Cheapest international/overall departure day | Friday |
| Domestic booking window | 15–30 days before departure |
| Safer international booking window | 31–45 days before departure |
| Cheapest domestic travel month | January |
| Cheapest month to fly overall | August |
| Guaranteed cheapest calendar date | None |
Treat these as broad patterns rather than fixed rules for every route.
What Is the Cheapest Day to Book a Flight?
Expedia’s 2026 U.S. Air Hacks data found that Friday was the cheapest day to purchase flights overall, averaging approximately 3% less than Sunday.
For U.S. domestic tickets specifically, Saturday was the cheapest booking day, averaging around 2% less than Monday. Saturday was also the cheapest day to book Business Class in Expedia’s data, although the difference from the most expensive day was only around 1%.
The small percentages matter: the day you fly can produce a larger difference than the day you purchase.
Is Tuesday still the best day to book?
No single weekday guarantees the lowest fare.
The old Tuesday rule came from an era when airlines released fare updates on predictable schedules. Modern fares change continuously based on demand, remaining inventory, competitors and booking activity.
Expedia found a Friday advantage in its 2026 dataset, but a route-specific fare drop on another day can easily be larger than the average 3% difference.
Practical rule: Do not delay a good fare until Friday merely because Friday was cheapest on average.
What Are the Cheapest Days to Fly?
The cheapest day to fly is not necessarily the cheapest day to purchase the ticket.
Domestic U.S. flights
Tuesday was the cheapest domestic departure day in Expedia’s 2026 dataset, averaging 14% less than Sunday. Tuesday was also the least busy day for airport travel.
International and overall travel
Friday was the cheapest departure day overall and for international travel, with average fares approximately 8% lower than Sunday. Friday was also the busiest travel day, so lower average fares did not necessarily mean quieter airports.
| Trip type | Lower-cost departure day | Higher-cost comparison |
|---|---|---|
| Domestic U.S. | Tuesday | Sunday |
| International | Friday | Sunday |
| Overall Expedia sample | Friday | Sunday |
Use Google Flights’ calendar or Date grid to compare the actual prices for your route. A Wednesday flight could still be cheaper than Tuesday, depending on demand and availability.
Internally link How to Use Google Flights here.
How Far in Advance Should You Book?
Domestic U.S. flights
Expedia found that booking domestic Economy 15–30 days before departure averaged $130 less than booking more than six months ahead.
Start tracking the route earlier, especially when:
- Your dates cannot change
- Only one airline operates the route
- You need several seats together
- You are travelling during a holiday
- You need a specific departure time
International flights
Expedia found its lowest international average 8–15 days before departure, but this should not be treated as a recommendation to wait until the last minute.
Booking 31–45 days ahead still averaged $190 less than purchasing more than six months before departure and provides more time to compare schedules and fare conditions.
For summer, Christmas, school holidays, major festivals or routes with limited competition, begin monitoring several months earlier and book when the complete fare is acceptable.
Read Best Time to Book International Flights: How Far in Advance
Recommended planning approach
| Trip | Start monitoring | Consider booking |
|---|---|---|
| Domestic, flexible dates | 2–3 months ahead | Around 15–30 days |
| Domestic, fixed or peak dates | 3–5 months ahead | Earlier when a suitable fare appears |
| International, flexible dates | 3–6 months ahead | Around 31–45 days |
| International peak travel | 6–10 months ahead | Earlier than normal |
| Award travel | When the schedule opens | When suitable award space appears |
The monitoring ranges are planning guidance, not guaranteed lowest-price windows.
Read more about Multi-City Flights vs Separate Tickets
What Is the Cheapest Month to Fly?
Expedia’s 2026 U.S. findings distinguish between domestic and overall travel:
- January was the cheapest month for domestic flights, averaging 19% less than December.
- August was the cheapest month overall, averaging 29% less than December.
- February was the least busy month.
- July, October and November produced a high number of fares classified by Expedia as deals.
This distinction matters. August may be cheapest across Expedia’s overall dataset without being the cheapest month for every domestic or international route.
Read more about Best Budget Airlines in the USA
Is There a Cheapest Day of the Year to Book Flights?
No. There is no universal calendar date when every airline lowers prices.
Claims about a “National Cheap Flight Day” or one guaranteed day of the year misunderstand airline pricing. Fares are adjusted by route, demand, seat inventory, competition and departure date rather than one coordinated annual sale.
Use the current fare for your route instead of waiting for a promotional calendar date.
Should You Book Now or Wait?
Consider booking now when:
- Google Flights labels the fare as low or typical
- You are inside a reasonable booking window
- Your dates are fixed
- You are travelling during a holiday or event
- The schedule and fare conditions work
- You have compared nearby dates and airports
Consider tracking first when:
- Your trip is several months away
- Current prices appear high
- Your dates are flexible
- Several airports or destinations could work
- You are not travelling during peak demand
Google Flights can track exact dates or “Any dates” and send notifications after significant price changes. It may also notify you when a fare is expected to increase.
Internally link where to find cheap flights in 2026 here.
Flying Getaway’s Five-Minute Booking Check
Before paying:
- Compare dates three days before and after your preferred flight.
- Check nearby departure and arrival airports.
- Compare the Best and Cheapest Google Flights tabs.
- Add baggage, seats and airport-transfer costs.
- Review the airline’s change and cancellation conditions.
- Check whether the same itinerary costs less on the airline’s website.
- Set a price alert when the fare is high and your dates are flexible.
Google’s Cheapest tab can include self-transfers, separate baggage handling and different airports, so read the complete itinerary rather than choosing only by price.
Flight-Booking Myths to Ignore
| Claim | Reality |
|---|---|
| Tuesday is always cheapest to book | Expedia found Friday overall in 2026, but no weekday guarantees the lowest route-specific price |
| Booking at midnight saves money | Prices change continuously rather than at one guaranteed hour |
| Incognito mode produces lower fares | It does not replace price tracking or comparison |
| Six months early is always cheapest | Expedia found lower averages much closer to departure |
| Last-minute flights are always cheaper | Availability and schedules can deteriorate close to departure |
| The lowest base fare is the best deal | Bags, seats, transfers and ticket restrictions can reverse the comparison |
Final Takeaway
The best time to book a flight in 2026 depends on the route, but Expedia’s U.S. data provides useful starting points:
- Book domestic Economy around 15–30 days ahead when your trip is flexible.
- Consider 31–45 days for international travel rather than relying on a risky last-minute purchase.
- Friday was the cheapest booking day overall.
- Saturday was cheapest for domestic purchases.
- Tuesday was cheapest to fly domestically.
- Friday was cheapest to fly internationally and overall.
- January was cheapest for domestic travel.
- August was cheapest across the overall dataset.
Use these averages as a guide, then verify your actual route with flexible dates and price alerts.
Need help comparing an international or multi-city itinerary? Call Flying Getaway at +1 (646) 814-6001.
Frequently Asked Questions
What is the best time to book a flight?
Expedia’s 2026 U.S. data found lower domestic Economy fares 15–30 days before departure. International travellers could save by booking 31–45 days ahead rather than more than six months before departure.
When are flights cheapest to book?
Friday was the cheapest booking day overall in Expedia’s 2026 data. Saturday was the cheapest day to purchase domestic U.S. tickets. The differences were only 3% and 2%, so fare tracking matters more than waiting for one weekday.
What are the cheapest days to fly internationally?
Friday was the cheapest international departure day in Expedia’s 2026 U.S. report, averaging approximately 8% less than Sunday.
Is Tuesday the cheapest day to buy flights?
Not consistently. Expedia found Friday cheapest overall and Saturday cheapest for domestic bookings in 2026. Tuesday was the cheapest domestic day to fly, not to purchase.
Do flights become cheaper closer to departure?
Sometimes, but waiting is risky. Expedia found low international averages 8–15 days before departure, while 31–45 days still offered substantial savings with more availability.
Can I cancel if the price drops after booking?
For qualifying bookings made directly with an airline at least seven days before departure, the airline must offer either a 24-hour hold or a full refund when cancelled within 24 hours. This federal airline requirement does not automatically cover third-party travel-agency bookings.
Patrick Walker is the travel brain behind Flying Getaway. With a knack for spotting flight deals and a passion for exploring new skies, he helps travelers fly smarter and save more with every trip.
