What is the cheapest day to book a flight?

Tuesday and Wednesday are generally the cheapest days to book flights in 2026. Airlines typically release sale fares on Monday evenings, and competitors match those prices by Tuesday morning. Booking Tuesday through Wednesday afternoon tends to catch the lowest available fares. Sunday is consistently the most expensive day to purchase tickets, with fares running 5–15% higher than the weekly low.

How far in advance should you book a flight?

For domestic flights within the US, the sweet spot is 1–3 months before departure. The lowest fares typically appear 6–8 weeks out. Booking earlier than 3 months rarely saves money and sometimes costs more as airlines hold back cheap inventory. For international flights, 3–6 months ahead is optimal, with the best prices often appearing 4–5 months before departure.

What is the cheapest day to fly?

Tuesday, Wednesday, and Saturday are the cheapest days to actually fly (depart). Friday and Sunday are the most expensive departure days because they coincide with peak leisure travel. Flying on Christmas Day, Thanksgiving Day, or New Year's Day itself (rather than the surrounding days) can save $100–$300 because most travelers have already reached their destination.

Do flight prices go down on Tuesday?

Flight prices have historically been lower on Tuesday and Wednesday compared to other days of the week. The pattern: airlines post weekend sales on Monday evening → competitors match by Tuesday morning → prices are lowest Tuesday–Wednesday → prices begin rising again Thursday as the weekend approaches. However, this is a general pattern, not a guarantee. Real-time fare comparison tools are more reliable than any day-of-week rule.

Is it cheaper to book flights last minute?

No — last-minute domestic flights are typically 20–40% more expensive than fares booked 4–8 weeks out, as airlines raise prices on remaining seats. The exception is last-minute sales on unsold seats, which do occasionally appear, but they are unpredictable in timing, destination, and availability. Waiting for a last-minute deal is a high-risk strategy that usually costs more.

Cheapest Day to Book Flights 2026 — Best Days to Buy Plane Tickets

The cheapest day to book flights is Tuesday or Wednesday. Airlines typically release new sale fares on Monday evening, and competing carriers match those prices by Tuesday morning — making mid-week the low point of the weekly fare cycle. Sunday is consistently the most expensive day to book, often 5–15% above the weekly average.

Best Day to Book vs. Best Day to Fly

These are two different questions with different answers:

	Cheapest Days	Most Expensive Days
Book (purchase) your ticket	Tuesday, Wednesday	Sunday, Friday
Depart (fly)	Tuesday, Wednesday, Saturday	Friday, Sunday

Booking on Tuesday for a Wednesday departure — both the purchase and travel day benefits — can stack for the deepest discount.

How Far Ahead to Book: Domestic vs. International

Flight Type	Optimal Booking Window	Avoid
Domestic US	4–8 weeks before departure	Under 7 days; over 6 months
International	3–6 months before departure	Under 3 weeks; over 8 months
Holiday travel	3–4 months before peak dates	Under 6 weeks before Thanksgiving/Christmas
Budget airlines (Spirit, Frontier)	6–10 weeks	Last-minute (prices spike)

The “Goldilocks” zone for domestic: 21–90 days out. Prices typically peak at 1–2 weeks before departure, then again at 0–3 months on the other end (too early = airlines haven’t discounted yet).

Cheapest Days to Actually Fly (Depart)

Flying mid-week costs meaningfully less than weekend travel:

Departure Day	Relative Cost
Tuesday	Lowest
Wednesday	Lowest
Saturday	Low
Monday	Moderate
Thursday	Moderate
Friday	High
Sunday	Highest

Saturday exception: Saturday departures are cheap because most business travelers fly Monday–Friday. If your schedule allows, Saturday departures can save $50–$150 on domestic flights vs. Sunday.

Holiday Flight Booking Calendar 2026

Holiday	Cheapest Booking Window	Cheapest Departure Day
Memorial Day (May 25)	Book by April 1	Fly Saturday May 23 or Tuesday May 26
July 4th (Saturday)	Book by May 15	Fly July 2 (Thursday) or July 7 (Tuesday)
Labor Day (Sep 7)	Book by July 15	Fly Saturday Sep 5 or Tuesday Sep 8
Thanksgiving (Nov 26)	Book by August 1	Fly Tuesday Nov 24 or early Nov 27
Christmas	Book by September 1	Fly Dec 22 or Dec 25 itself
New Year’s	Book with Christmas	Fly Jan 1 itself (fewer travelers)

Pro tip for Thanksgiving: Flying Tuesday (not Wednesday) before the holiday and Monday (not Sunday) after saves an average of $80–$150 each way vs. peak travel days.

Rules That Beat the Day-of-Week

1. Set fare alerts. Google Flights, Kayak, and Hopper let you track a route and notify you when prices drop. This beats any day-of-week rule by responding to actual pricing movements.

2. Be flexible on airports. Flying into a secondary airport (Midway instead of O’Hare; Fort Lauderdale instead of Miami; Oakland instead of SFO) often saves $50–$150. Factor in transportation cost to/from the secondary airport.

3. Avoid direct flights for savings. A connection adds 2–4 hours but can save $100–$300+ on longer routes, especially international.

4. Clear cookies / use incognito mode. Some fare aggregators dynamically raise prices after multiple searches for the same route. Searching in a private/incognito browser window prevents this.

5. Check budget airline rates separately. Spirit, Frontier, and Allegiant don’t always appear on Google Flights or Kayak. Check their sites directly, factoring in bag fees (which can add $50–$100 round-trip).

When the Cheapest-Day Rules Break Down

Last-minute sales: Airlines occasionally dump unsold seats at deep discounts days before departure, but the timing and routes are unpredictable.
Award/miles bookings: The cheapest day to book with miles follows different rules — availability opens up either 11 months ahead or in the last 24 hours on some airlines.
International with fuel surcharges: The day-of-week effect is smaller on long-haul international routes where fuel and taxes dominate the ticket price.

For more travel saving strategies, see how early to get to the airport and Spirit Airlines review.

Written by WealthVieu

WealthVieu researches and writes data-driven personal finance guides using primary sources including the IRS, Bureau of Labor Statistics, Federal Reserve, and Census Bureau.

The content on Wealthvieu is for informational purposes only and should not be considered financial, tax, or investment advice. Consult a qualified professional before making financial decisions. Full disclaimer · Editorial policy