A. 1. Use filters: After performing a search, look for any available filters that may allow you to set preferences for flight duration. 2. Clear app cache: Go to Settings > Apps > Momondo > Storage > Clear Cache to ensure filters work correctly. 3. Use the website: If the app does not allow you to set duration preferences, try using the Momondo website, which may offer more options.

B. 4. Monitor flight options: Manually check flight durations and select flights that meet your preferences.