Booking
How to find cheap last-minute flights
By the TSA Wait Times team · Updated · Published June 2026
Most last-minute flights cost more, not less. Airlines use revenue management software to hold unsold seats at increasingly high prices as departure nears — betting that business travelers and distressed passengers will pay whatever is needed. Last-minute fares are typically 20–50% more expensive than the same seat booked 3–6 weeks out. But specific booking windows, budget carrier flash sales, and destination-flexible search tools can surface genuine deals if you stay flexible.
The best tools for finding last-minute flight deals in 2026
Google Flights added AI-powered deal discovery in 2026, letting you describe your ideal trip and see the cheapest matching options — useful when your destination is flexible. The Explore map view shows cheapest fares from your home airport over the next few days. Hopper's Watch feature tracks specific routes and sends a push alert when the price drops below a threshold. Going (formerly Scott's Cheap Flights) sends spontaneous fare alerts and has a dedicated last-minute deals feed for subscribers. For individual airline flash sales — especially Southwest and Frontier — you must check their sites directly, as OTAs never carry these deals.
| Tool | Best for | Key feature for last-minute |
|---|---|---|
| Google Flights Explore | Flexible destination, flexible dates | AI deal discovery + cheapest-destination map |
| Hopper Watch | Watching a specific route | Price-drop push alerts, fare prediction |
| Going (Scott's Cheap Flights) | Spontaneous deal discovery | Dedicated last-minute deals feed for members |
| Skiplagged | Budget-conscious, carry-on only, one-way | Hidden-city fares; ruled legal by US court (2025) |
| Southwest.com | Southwest routes only | Flash sales only bookable direct, not on OTAs |
Destination-first search: how flexibility unlocks the biggest savings
The single most powerful lever for last-minute savings is being open about whereyou go, not just when. Google Flights' Explore view shows the cheapest available fares from your home airport over the next several days across all destinations — a $79 fare to a city you hadn't considered is often cheaper than a $350 fare to your original target. Combine destination flexibility with a ±1 day date range to maximize options.
- Open Google Flights → Explore → set “This week” or “Next 7 days”
- Sort by cheapest destination, not by preferred destination
- Set Hopper alerts for multiple destinations, not just one
- Being flexible on your return date often matters more than the outbound date for last-minute trips
- Hopper and Going push spontaneous “mistake fare” alerts that only make sense if you can act within a few hours
Common questions about last-minute flights:
Why last-minute flights are almost always more expensive — and when they're not
Airlines hold unsold seats at high prices close to departure because business and emergency travelers are relatively price-insensitive. The exception is genuinely under-demand routes where a carrier would rather discount than fly with empty seats, typically 2–3 days out. Budget carriers on low-demand routes are the most likely source of genuine last-minute drops.
The best time windows to check for last-minute discounts
Check 2–3 days before departure for the best chance of inventory-clearance discounts, and early morning (midnight–6 a.m.) on the day of travel when some carriers release remaining seats at lower prices rather than fly empty. Avoid Friday and Sunday departures — mid-week (Tuesday/Wednesday) flights hold lower last-minute fares more consistently.
Budget carriers: where last-minute deals still actually live
Frontier Discount Den members ($60/year) regularly see fares from $29–$48 one-way within 7 days. Southwest runs promotional sales — such as its Week of WOW (June 2026, up to 40% off with code FLYWOW) — exclusively on southwest.com; these sales never appear on Google Flights, Expedia, or other OTAs. Note: Spirit Airlines, formerly a major flash-sale source, ceased operations in May 2026.
Hidden-city fares (Skiplagged): the savings are real, the risks are real
A US federal court ruled hidden-city ticketing legal in June 2025, so Skiplagged continues to operate. However, airlines prohibit it in their contracts of carriage and can terminate frequent-flyer accounts; only use it with carry-on luggage and for one-way bookings. The trick only works when your real destination is a connecting stop on a cheaper through-itinerary.
Same-day standby: get on an earlier or later flight, sometimes free
Delta offers same-day standby at no charge for all passengers (verified 2026). United and American charge around $75 unless you hold elite status or a premium cabin ticket. Request standby at the gate or via the app before your original flight departs — you remain confirmed on your ticketed flight until a seat opens on the earlier departure.
Data verified . Sources: Southwest flight deals; Southwest Week of WOW press release; Skiplagged ruling (TravelPulse); Delta same-day standby policy; Frontier flights.
Know your Leave-By Time before you book last-minute
A last-minute deal only saves money if you make the flight. Before confirming any booking, check live TSA wait times at your departure airport and fold them into the exact moment you need to leave home. The Leave-By Time calculator stacks your airport's live security wait, drive time, parking, and airline check-in cutoff into one time to walk out the door — so a $79 deal doesn't turn into a missed flight.
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