Start with the flight search engines that show multiple airlines at once
The fastest way to find a flight is to use a flight comparison site that pulls prices from many airlines in one search. Google Flights, Kayak, Skyscanner, and Momondo all work the same way: you enter your departure city, destination, and travel dates, and the site shows you every available flight sorted by price, duration, or departure time.
These sites do not sell the tickets themselves — they show you what airlines are offering and link you directly to the airline or a booking site to complete the purchase. This means you see the real price before you commit, and you can compare the same flight across different sellers to find the lowest cost.
Start with Google Flights if you are flexible on dates, because it shows a calendar view where you can see which days are cheapest at a glance. Use Kayak or Skyscanner if you want to filter by specific things like number of stops, departure time, or airline.
Key Takeaways
- Flight comparison sites like Google Flights and Kayak search multiple airlines at once and show you the real price before you book.
- Searching for flights on Tuesday or Wednesday, and booking at least three weeks in advance, often costs less than last-minute bookings.
- Flying early morning or late evening is usually cheaper than midday flights on the same route.
- Nearby airports sometimes have much lower fares for the same destination, so search a few options if you have the flexibility.
- Airline websites themselves sometimes show lower prices than comparison sites, so check the airline directly before you buy.
Narrow your search by date, time, and number of stops
Once you have entered your basic trip details, use the filters on the comparison site to cut down the list. Most sites let you filter by departure time (early morning, afternoon, evening), number of stops (nonstop only, or allow one stop), and price range.
If you are flexible on dates, searching a range of dates instead of a single day often reveals cheaper options. For example, searching "March 15–20" instead of just "March 15" shows you every combination and highlights the cheapest days. Many people find that flying on a Tuesday, Wednesday, or Saturday is cheaper than flying on Friday or Sunday.
The time of day matters too. Early morning flights (5 a.m. to 8 a.m.) and late evening flights (after 8 p.m.) are usually cheaper than midday or early afternoon departures on the same route. The trade-off is that you arrive tired or very late, so decide whether the savings are worth the inconvenience.
Check nearby airports and alternative routes
If you live in or near a city with multiple airports, search each one separately. For example, the New York area has three major airports (JFK, LaGuardia, Newark), and fares can differ by hundreds of dollars. The same applies to your destination — if you are flying to a region with more than one airport, compare prices to each one.
Some comparison sites have a "flexible destination" or "explore" mode that shows you fares to many cities at once. This is useful if you have a general region in mind but no specific destination. You might find that flying to a smaller nearby city and renting a car is cheaper than flying to the major airport.
You can also search for flights with a connection in between, even if you plan to drive the last leg. For instance, a flight to a hub city with a connection to your final destination might be cheaper than a direct flight, and you could skip the second flight and rent a car instead.
Compare prices across airline websites and booking sites
After you find a flight on a comparison site, visit the airline's own website and search for the same flight. Airlines sometimes offer lower prices on their website than on third-party booking sites, or they show different fares because of how they calculate taxes and fees.
Write down the flight number, departure time, and airline before you leave the comparison site, so you can search for it directly on the airline's website. The price difference is often small, but on a long or expensive flight it can add up.
Be aware that some booking sites charge a booking fee on top of the airline's price, while others do not. Read the fine print before you click "buy" — the total price should match what you saw in the search results, with no surprise fees added at checkout.
Book at the right time to lock in lower fares
Booking timing affects price. Research suggests that booking three to six weeks before your departure date often yields lower fares than booking closer to the trip. Booking very far in advance (two months or more) is sometimes cheaper, but not always — it depends on the route and season.
Avoid booking on Friday or Sunday, when many people search and prices tend to be higher. Tuesday and Wednesday mornings often show lower fares, possibly because airlines adjust prices after the weekend rush.
Set up price alerts on Google Flights, Kayak, or your airline's website if you have flexible travel dates. These alerts notify you when the price drops for your route, so you can book when fares dip without checking manually every day.
Understand what is included and what costs extra
The price shown in search results is the base fare. Before you book, check what is included and what you will pay extra for. Most airlines now charge separately for checked baggage, seat selection, and carry-on bags (though one carry-on is usually free). Some airlines charge for water, snacks, and blankets on longer flights.
Budget airlines like Spirit and Frontier have very low base fares but charge for almost everything — baggage, seat selection, even printing your boarding pass at the airport. A budget airline ticket that looks cheap can end up costing more than a full-service airline once you add fees.
Read the airline's baggage policy and seat selection policy before you book. If you need to check a bag or want to choose your seat in advance, factor those costs into your total price when comparing airlines.
Use airline websites directly for frequent flyer benefits and special fares
If you have a frequent flyer account with an airline, book directly on that airline's website to earn miles. Comparison sites do not always credit miles to your account, or they credit them slowly. Booking on the airline's website ensures your miles post when ready.
Airlines also offer sales and special fares on their own websites that may not appear on comparison sites. Sign up for email alerts from airlines you fly often, and check their websites during holiday weekends and seasonal sales.
Some airlines offer discounts for booking round-trip flights together instead of separately, or for booking a flight and hotel as a package. These deals are usually only visible on the airline's website, not on comparison sites.
Frequently Asked Questions
What time of year is cheapest to fly?
Prices vary by route and destination. Generally, flying in the off-season (January through early March, September through November) is cheaper than summer or winter holidays. Avoid flying during major holidays like Thanksgiving, Christmas, and spring break if you want lower fares.
Should I book a round-trip or two separate one-way flights?
Round-trip flights are usually cheaper than two one-way flights on the same airlines. However, if you are flying on different airlines for each leg, two one-way tickets might be cheaper. Search both ways and compare the total price before you decide.
Do I have to book a hotel at the same time as my flight?
No. Booking a flight and hotel together sometimes saves money through package deals, but not always. Search them separately and together to see which option costs less. You can also book the flight now and the hotel later if prices drop.
What happens if I book a flight and the price drops before my trip?
Most airlines do not refund the difference if the price drops after you book. Some airlines let you cancel and rebook at the new lower price if you have a refundable ticket, but basic economy tickets are usually non-refundable. Check the airline's cancellation policy before you book.
Can I search for flights without an account?
Yes. Comparison sites and airline websites let you search and book without creating an account. However, creating an account on airline websites lets you save favorite routes, track prices, and earn frequent flyer miles, so it is worth doing if you fly regularly.