Summer has arrived, the weather’s warm and vacation season is in full swing. Chances are you’ll be catching a flight this summer — whether you’re going domestic or international, use these tips for a more enjoyable and efficient flying experience.

1. Use travel apps.

Find cheap flights with these apps: Skiplagged – Shows you hidden-city ticketing options to get you a flight for up to 50% less. Hopper – Predicts upcoming price trends.

2. Contact the airline directly.

Has your flight fare lowered since you booked? Contact the airline — some will give you the difference back in airline credit.

3. Skip the long lines.

Skip long security lines. Apply for TSA Precheck ($85 for five years) to save time and stress. For international travel, apply for Global Entry ($100 for five years) to expedite the customs process.

4. Ask about travel vouchers.

Give up your seat for a travel voucher. If you’re not in a rush to get to your destination and you find yourself on an over-booked flight, let the ticketing counter know. They may offer you travel vouchers for giving up your seat.

5. Lounge in comfort.

Long day of travel ahead? Head to the airport’s website to pre-book an airport lounge pass. Gain access to a quiet space with complimentary refreshments, magazines, WiFi, etc. There is an upfront fee, but it provides a relaxing start to your travels.