How to Find Cheap Flights: A Step-by-Step Search Strategy

Start your search on the right day and time

Airfare prices shift constantly, and the day you search matters as much as the day you fly. Prices tend to be lowest on Tuesday and Wednesday mornings, when airlines have finished their Monday sales and haven't yet launched weekend promotions. Searching in the early morning — between 6 a.m. and 9 a.m. — often shows lower fares than searching at night, though this varies by airline and route.

The timing of your purchase relative to your travel date also affects price. For domestic flights, booking two to three weeks ahead typically gives you the best rates. For international flights, aim for one to two months out. Booking too far in advance or waiting until the last week usually costs more, though last-minute deals do occasionally appear on routes airlines need to fill.

Clear your browser cookies before searching, or use an incognito window. Some search engines and airline websites track your searches and may show you higher prices if they see you've looked at the same route multiple times.

Key Takeaways

• Search on Tuesday or Wednesday mornings in an incognito browser window to avoid price tracking.
• Book domestic flights two to three weeks ahead and international flights one to two months ahead for the lowest fares.
• Set up price alerts on flight search engines so you see drops without checking manually every day.
• Flying on Tuesday, Wednesday, or Saturday typically costs less than flying on Friday or Sunday.
• Nearby airports, flexible dates, and one-stop flights often cost significantly less than direct flights on your preferred day.

Use flight search engines to compare prices across airlines

Flight search engines pull fares from multiple airlines at once, so you see the lowest price available rather than checking each airline individually. The major search engines are Google Flights, Kayak, Skyscanner, and Momondo. Each pulls from slightly different airline databases and displays results differently, so checking two or three often reveals fares the others missed.

Google Flights has a calendar view that shows the cheapest day in your travel window at a glance — useful if your dates are flexible. Kayak and Skyscanner let you set price alerts that email you when fares drop on a specific route. Momondo sometimes shows budget carriers that other engines miss, particularly for European routes.

Enter your search with flexibility built in. If you can fly any day in a week, search the whole week. If you can use either of two nearby airports, search both. The search engine will show you the cheapest combination, not just the cheapest flight on your preferred day from your preferred airport.

Check budget airlines separately from major carriers

Budget airlines like Southwest, Spirit, Frontier, Allegiant, and Ryanair often don't appear in all search engines, or their fares appear higher because the search engine doesn't account for their baggage fees upfront. Searching these airlines directly on their websites sometimes reveals cheaper base fares than the search engines show.

Budget airlines make money on fees rather than ticket price, so the advertised fare is only the start. Check what's included: most charge for carry-ons, checked bags, seat selection, and changes. Add these costs to the base fare before comparing to a major airline's all-in price. A $60 Spirit flight often costs $120 once you add a checked bag and a carry-on.

For short domestic routes under three hours, budget airlines are often genuinely cheaper even with fees. For longer flights or trips where you need flexibility, the major carriers' all-in price may be lower.

Adjust your travel dates and airports to lower the fare

The single biggest factor in flight price is demand on that specific route on that specific day. Flying on Tuesday, Wednesday, or Saturday costs less than Friday or Sunday. Flying early morning or late evening costs less than mid-morning or afternoon. Flying into a secondary airport costs less than the major hub.

If you're flying from a city with multiple airports, check all of them. Flying from Oakland instead of San Francisco, or from Newark instead of JFK, can save $100 or more on the same route. The same applies to your destination: flying into Fort Lauderdale instead of Miami, or into Long Beach instead of Los Angeles, often costs significantly less.

If your dates are flexible by even a few days, use the calendar view in Google Flights to see the price for each day. A Wednesday flight might be $150 cheaper than Friday on the same route. If you're flexible by a week or more, search a full month and book whichever day is cheapest.

Consider one-stop and connecting flights

Direct flights are convenient but expensive. A one-stop flight on the same route often costs $100 to $300 less, even if it adds two to four hours to your travel time. A connecting flight with a longer layover costs even less. The trade-off is time and the small risk that a missed connection delays you further.

When you search on a flight engine, you can usually filter to show only one-stop or connecting flights, or set a maximum layover time. A two-hour layover is tight; three to four hours is comfortable and gives you buffer if your first flight is delayed. Overnight layovers are rare in search results but do appear occasionally and can be significantly cheaper.

If you're considering a connecting flight, check whether your bags are checked through to your final destination or whether you have to collect and recheck them. You'll see this in the flight details. If you have to recheck, allow extra time between flights.

Set up price alerts and check them weekly

Price alerts on Google Flights, Kayak, or Skyscanner email you when fares drop on a route you're watching. Set alerts for your preferred dates and for a week before and after, so you see if shifting by a few days saves money. Check your alerts weekly rather than daily — obsessive checking doesn't change the price and creates false urgency.

Alerts work best when you set them at least three to four weeks before you plan to travel. Prices stabilize closer to the travel date, so watching for drops in the final week rarely saves money. If you see a price you're comfortable with, book it — waiting for a lower price in the final days is a gamble that usually doesn't pay off.

Some search engines let you set alerts for a whole month or season rather than specific dates. This is useful if you're flexible about when you travel and just want to know when fares to a destination drop below a certain price.

Book directly with the airline after comparing prices

Once you've found the cheapest flight on a search engine, go to the airline's website and book there rather than through the search engine. The price is the same, but booking directly gives you the airline's customer service if something goes wrong. If you book through a third-party site and your flight is cancelled, you may have to contact both the third-party site and the airline to get a refund or rebooking.

Before you complete the purchase, check what's included in your fare. The airline's website will show you the baggage allowance, seat selection policy, and change fees. Some airlines include a carry-on and personal item; others charge for both. Some allow free changes; others charge $75 or more to change your flight.

Complete your booking and save your confirmation email. You'll need the confirmation number to check in online 24 hours before your flight.

Frequently Asked Questions

Do I really need to search in incognito mode?

Incognito mode prevents your browser from storing cookies that track your searches, which some websites use to show higher prices to repeat visitors. It's a simple precaution that takes no extra time. Whether it actually changes the price you see varies by website, but there's no downside to using it.

What's the difference between a layover and a connection?

The terms are used interchangeably. A layover is the time you spend on the ground between flights. A connection is the flight you're connecting to. A two-hour layover means you have two hours on the ground before your next flight departs.

Should I book a round-trip ticket or two one-way tickets?

Check the price of both. Round-trip tickets are usually cheaper, but occasionally two one-way tickets on different airlines cost less. Search both ways on your flight engine and book whichever is cheaper. One-way tickets also give you more flexibility if you want to change your return date.

Can I get a refund if I find a cheaper flight after I book?

Most airlines don't refund the difference if the price drops after you book. Some allow you to cancel and rebook at the lower price, but you'll pay a change fee that may eat up the savings. Once you book, the price is locked in unless the airline cancels the flight.

What time of year are flights cheapest?

Flights are cheapest during shoulder seasons — late August through early September, late November through early December (after Thanksgiving), and January through early February. Summer, winter holidays, and spring break are the most expensive times to fly. Prices vary by destination, so check your specific route rather than assuming a season is cheap everywhere.