How to Book a Flight Online

Book a flight online by searching for flights, comparing prices, and completing your purchase on an airline or travel website.

Steps

1
Open a travel website
like Expedia, Kayak, or Google Flights in your browser. You can also use a specific airline site.
2
Enter your trip details
including departure city, destination, travel dates, and number of passengers. Check the box for round trip if needed.
3
Compare the search results
by price, flight time, and number of stops. Nonstop flights cost more but save you time.
4
Select your preferred flight
and choose your seat and baggage options. Basic economy tickets often do not include a carry on bag.
5
Enter passenger information and payment details
then review everything before clicking "Book." Save the confirmation email with your itinerary.

How far in advance should I book a flight?Show

Book domestic flights 1 to 3 months ahead and international flights 2 to 6 months ahead for the best prices.

Can I cancel my flight after booking?Show

Most airlines offer free cancellation within 24 hours of booking. After that, cancellation policies depend on your ticket type.

Do I need a passport to book an international flight?Show

You do not need a passport to book, but you must have a valid passport to travel. Check expiration dates before booking.

Written by the HowToDoStuff.online editorial team. Last updated May 18, 2026.