1. Use Google Flights Explore to Find Cheap Destinations
Google Flights Explore is the best free tool for finding cheap flights. Enter your departure city, then click "Explore" to see a map of prices to destinations worldwide. You can filter by budget, dates, and interests. For example, from New York, you might find round-trip flights to Dublin for $350 in March. The tool shows prices for a full month, so you can spot the cheapest days. I've used this to book a $420 round-trip to Madrid when other sites showed $700+.
2. Set Fare Alerts on Multiple Platforms
Don't rely on one source. Set alerts on Google Flights, Skyscanner, and Kayak. Each uses different algorithms. Google Flights alerts are great for specific routes, while Skyscanner's "Everywhere" search shows the cheapest destinations. Kayak's alerts include fare forecasts. I set alerts for my home airport to anywhere, and within a week, I got a notification for a $298 round-trip to Cancun. That's 40% off the usual price.
3. Book on Tuesday or Wednesday for Domestic Flights
Airlines often release sales on Monday nights, and other airlines match by Tuesday. Booking on Tuesday or Wednesday can save you 10-20% on domestic flights. For international flights, the day matters less, but booking 2-4 months in advance is key. According to a 2025 study by CheapAir, the best time to book domestic flights is 70 days before departure, and international is 120 days. I booked a $220 round-trip from Chicago to Denver by booking on a Tuesday, 60 days out.
4. Fly on Off-Peak Days and Times
Tuesday, Wednesday, and Saturday are the cheapest days to fly. Avoid Friday and Sunday. Early morning flights (before 7 AM) and late-night flights (after 8 PM) are also cheaper. For example, a Friday evening flight from LA to Seattle might cost $180, while the same flight on Wednesday at 6 AM is $98. Use the "date grid" on Google Flights to compare prices across days.
5. Consider Nearby Airports and Split Ticketing
Check alternate airports. Flying into Baltimore instead of Washington D.C. can save $100. Or into Oakland instead of San Francisco. Also, try split ticketing: booking two one-way tickets on different airlines. This can be cheaper than a round-trip, especially for international flights. I once saved $200 by flying JetBlue to London and Norwegian back to New York, booked separately. Just leave enough time between flights if checking bags.
6. Use Incognito Mode and Clear Cookies
Airlines and booking sites may track your searches and increase prices. Always search in incognito mode or clear your cookies. I've seen prices drop by $50 after switching to incognito. Also, use a VPN to change your location; sometimes fares are cheaper when searched from another country. For example, a flight from Toronto to Paris was $100 cheaper when searched from a French IP.
7. Don't Overlook Budget Airlines and Error Fares
Budget airlines like Ryanair, EasyJet, and Spirit offer ultra-low fares, but watch for baggage fees. For long-haul, check Norwegian, WOW (if still operating), and Level. Error fares are mistake prices that can be 80% off. Follow sites like Secret Flying and Fly4Free. I booked a $250 round-trip from Boston to Dubai thanks to an error fare. Act fast—they disappear within hours.