Does booking on a Tuesday really make it cheaper?

It's less about the specific day of the week and more about airline inventory management. Airlines release fare classes on these days, making lower prices available.

Is it better to book one-way tickets?

Usually no. Airlines generally price round-trips more competitively. Use one-way tickets only if you are flying into one city and out of another ('open-jaw' flights).

Booking flights for the lowest price

For international flights, book 3 to 6 months in advance. For domestic flights, aim for 1 to 3 months before your departure date to capture the best pricing.

Set up price alerts early. Use Google Flights or Skyscanner to track your route at least 6 months before you plan to travel. Set alerts to receive email notifications when the price drops.
Monitor the 'Goldilocks Window'. Avoid booking too early (more than 9 months out) as airlines may not have released their most competitive fares. Don't wait until the final 21 days, when prices spike significantly.
Use Incognito Mode (as a precaution). While airlines claim they don't track your specific searches to inflate prices, clearing cookies or using Incognito mode ensures you are seeing the 'fresh' raw fare from the GDS (Global Distribution System).
Execute the booking on a Tuesday or Wednesday. Mid-week booking often aligns with when airlines load their fare sales into the system. Avoid booking on Sundays, which are historically the most expensive days to purchase.

Does booking on a Tuesday really make it cheaper?: It's less about the specific day of the week and more about airline inventory management. Airlines release fare classes on these days, making lower prices available.
Is it better to book one-way tickets?: Usually no. Airlines generally price round-trips more competitively. Use one-way tickets only if you are flying into one city and out of another ('open-jaw' flights).