1. Book on the Right Day (It's Not Tuesday)
The old myth says Tuesday is cheapest, but data from Hopper shows prices bottom out on Sunday for domestic flights. For international, Wednesday is often 10-15% cheaper. Set a Google Flights alert and watch for 2-3 weeks. Prices fluctuate daily, but the sweet spot is 3-5 months before departure for domestic and 4-6 months for international.
2. Use Error Fares to Your Advantage
Error fares are pricing mistakes that can save you 50-80%. Sites like Secret Flying and Airfarewatchdog track them. When you find one, book immediately—airlines often cancel within hours. I snagged a $220 round-trip from NYC to Paris last year. Just be ready with flexible dates and a credit card.
3. Fly Budget Carriers (But Read the Fine Print)
Spirit, Frontier, and Allegiant offer fares as low as $29 one-way. But add a carry-on ($50+ each way) and seat selection, and you might pay more than a legacy carrier. Pack light—personal item only—and you'll save big. For international, Norwegian and WOW (though WOW is gone) proved budget transatlantic works. Now Play and French Bee fly cheap to Europe.
4. Try Hidden-City Ticketing (Carefully)
Book a flight with a layover in your actual destination and skip the last leg. Example: Fly NYC to Dallas via Chicago, get off in Chicago. It can save 30-50%. But airlines hate it—don't check bags, don't do it round-trip, and don't link your frequent flyer number. Skiplagged.com finds these fares. Use sparingly.
5. Book One-Way Flights on Different Airlines
Round-trip isn't always cheaper. Mix and match one-ways on Southwest, JetBlue, and international carriers. I flew LA to Tokyo on Singapore Airlines ($450) and returned on Zipair ($320) for $770 total—$300 less than the cheapest round-trip. Check both directions separately.
6. Use a VPN and Incognito Mode
Airlines and OTAs sometimes show different prices based on your location and browsing history. Clear cookies or use incognito. A VPN set to a country with a weaker currency can occasionally show lower fares. It's not guaranteed, but it takes 10 seconds and costs nothing.
7. Fly on Off-Peak Days and Times
Tuesday, Wednesday, and Saturday are cheapest. Red-eyes and early morning (before 7am) save 15-20%. Avoid Friday and Sunday. For international, flying on Christmas Day or New Year's Day can save 30%. I flew to London on Dec 25 for $380 round-trip—half the usual.