How to Find Cheap Flights Every Time

Best Time to Book Flights

Timing is everything when booking flights. According to data from Google Flights, the best time to book domestic flights is between one and three months before departure. For international flights, book two to eight months in advance for the best prices. The cheapest days to fly are typically Tuesday, Wednesday, and Saturday, while Sundays and Fridays are the most expensive.

Contrary to popular belief, there is no magic day of the week to book. Airlines adjust prices in real time based on demand and competitor pricing. The key is to track prices over time rather than waiting for a specific day. Set a price threshold and book when your desired flight hits that target. For more budgeting strategies while traveling, check out our budget travel guide.

Using Flight Search Engines

Not all flight search engines are equal. Google Flights is widely considered the best tool for price comparison because it aggregates data from most airlines including budget carriers, offers a flexible date grid, and can track prices over time. Skyscanner is excellent for exploring cheap destinations with its everywhere search feature, which shows you the cheapest places to fly from your chosen airport.

Kayak offers price forecasts that tell you whether to book now or wait, and Momondo often finds fares that other sites miss. Use multiple search engines to compare, but always check the airline's official website before booking, as some airlines reserve their best prices for direct bookings. Clear your browser cookies or use incognito mode when searching repeatedly for the same route.

Fare Alerts and Price Tracking

Fare alerts automate the hard work of finding cheap flights. Google Flights lets you toggle on price tracking for any route, sending email notifications when prices drop significantly. Skyscanner has a similar price alert feature for both flights and hotels.

For serious deal hunters, subscription services like Scott's Cheap Flights (now Going) and Dollar Flight Club send curated mistake fares and flash sales directly to your inbox. The free tiers offer enough deals to save hundreds of dollars per year. The premium tiers, costing around $50 per year, provide access to business class deals and more frequent alerts.

Incognito Mode and Cookies

The theory that airlines raise prices based on your search history has been debated for years. While studies have found little evidence of systematic price manipulation based on cookies, it is still good practice to use incognito or private browsing mode when searching for flights. Some booking platforms display higher prices after repeated searches for the same route.

Use a VPN to search from different countries. Some airlines offer lower fares in certain markets, and searching from a different country's server can reveal these discounts. However, be aware that you must book with a payment method and address matching that country. This strategy works well for regions like Southeast Asia and South America where local carriers offer significantly lower fares.

Budget Airlines vs Full-Service

Budget airlines like Ryanair, Spirit, AirAsia, and EasyJet can offer incredible base fares, sometimes as low as $20-50 for short-haul flights. However, these low prices come with strict baggage limits, no included meals, and fees for everything from seat selection to printing your boarding pass at the airport.

When comparing costs, add up the base fare plus all fees. A $30 base fare can easily become $100 with a carry-on bag, seat assignment, and priority boarding. Full-service airlines like Emirates, Singapore Airlines, and Delta often include two checked bags, meals, entertainment, and seat selection in the ticket price. For short trips, budget airlines usually win, but for long-haul or luggage-heavy travel, full-service can be better value. Pack light with help from our packing guide to get the most from budget airlines.

Mistake Fares and Error Pricing

Mistake fares occur when airlines accidentally publish fares far below their intended price due to currency errors, technical glitches, or human mistakes. These fares are usually honored by airlines, especially in the United States and Europe, and can save you 50-90% off normal prices.

Websites like Secret Flying and The Flight Deal specialize in finding and publishing mistake fares. The key to booking mistake fares is speed. You need to book within hours of the fare being published. Have your passport ready, save your travel details in a notes app, and be flexible with your travel dates. Airlines sometimes cancel mistake fares, but at least half are honored.

Flexible Dates and Nearby Airports

Flexibility is your strongest weapon in finding cheap flights. Shifting your departure by just one or two days can save hundreds of dollars. Use the flexible dates feature on Google Flights or Skyscanner to see prices across a whole month. The price graph shows you exactly which dates are cheapest.

Similarly, consider flying into or out of nearby airports. For example, flying into London Gatwick instead of Heathrow, or Paris Beauvais instead of Charles de Gaulle, can significantly reduce costs. Factor in the cost and time of ground transportation from the alternate airport to your final destination. Sometimes the savings are worth the extra travel time. Learn about sustainable alternatives for getting around in our sustainable travel guide.

Airline Mileage and Points

Frequent flyer programs and travel credit cards can dramatically reduce your flight costs. The best travel credit cards for earning points include the Chase Sapphire Preferred, American Express Gold Card, and Capital One Venture Rewards. These cards earn transferable points that can be moved to airline partners, often at a better value than booking through the card's travel portal.

Sign up for loyalty programs with the airlines you fly most often, even if you only fly once per year. Miles rarely expire on active accounts, and you can earn miles through shopping portals, dining programs, and hotel stays. For maximum value, transfer points to airline partners for premium cabin redemptions. A business class flight to Asia that costs $5,000 might cost only 70,000 points plus taxes when booked through an airline partner.

Booking Strategies for International

International flights require different strategies than domestic ones. Book international flights 3-6 months in advance for the best prices. Consider booking two separate one-way tickets instead of a round-trip, especially if you plan to visit multiple countries. This allows you to fly into one city and out of another.

Try the hidden city ticketing strategy with caution. This involves booking a flight with a layover in your intended destination and skipping the final leg. While this can save money, airlines frown upon it and may penalize frequent offenders. The best resource for understanding routing options is Booking.com's flights feature, which shows multi-city combinations clearly.

Consider repositioning flights. Flying from a major hub like New York, London, or Dubai is often cheaper than flying from smaller regional airports. You can book a separate cheap flight or train to the hub, then catch the international flight from there.

Common Mistakes to Avoid

The biggest mistake travelers make is waiting too long to book. While last-minute deals exist, they are rare and unreliable. Another common error is checking only one search engine. Always check at least Google Flights, Skyscanner, and the airline's own website.

Do not ignore booking fees. Some third-party sites add booking fees, seat selection fees, and credit card surcharges that can double the ticket price. Always check the final price before entering payment details. Avoid booking through third-party sites for international travel, as changing or canceling a ticket booked through a third party is far more difficult than booking direct with the airline. Finally, do not overpack. Baggage fees can add $60-100 per checked bag round-trip. For packing advice, read our packing list guide.