1. CARRY-ON BAG
Most airlines still let you bring one carry-on bag for free, but some don’t. Granted, whether you have to pay for a carry-on bag typically depends on what type of ticket you purchased and the size of the bag. American Airlines and United, for example, recently rolled out basic economy seats that charge passengers an extra $25 per “full-sized carry-on bag,” or any luggage that requires overhead bin space. (Basic economy ticket holders are still allowed one free personal item that fits under the seat in front of you.)
2. RESERVATION CANCELLATION AND CHANGE A number of airlines charge customers a fee to cancel or change a reservation, and these fees can range significantly. American Airlines imposes a $200 change fee on paid fares for domestic flights and up to $750 for international flights, and Delta Air Lines charges a $200 change fee for paid domestic flights and up to $500 for international flights; meanwhile, Allegiant only charges a change fee of up to $75 per person. Southwest Airlines has the friendliest change and cancellation policies, with no fees in either case (though you’ll have to make up any difference in the fare).
There is an exception: when booking a domestic flight, the U.S. Department of Transportation regulations require that, as long as you've booked a non-refundable ticket seven days ahead of your flight, you're entitled to change or cancel your reservation within 24 hours of booking without paying a fee.
3. OVER-THE-PHONE AND IN-PERSON BOOKING
It’s typically free to book a flight online, but many airlines charge a fee for booking a flight over the phone or in person. Phone-booking fees range from $0 to $25 and in-person booking fees range from $0 to $35, according to a 2016 report by Consumerist.com.
4. IN-FLIGHT WI-FI
While JetBlue offers free high-speed Wi-Fi to all passengers, most airlines charge customers for in-flight Internet access. Some airlines charge a flat fee for the full flight, while others charge an hourly rate. (Prices can also vary depending on whether it’s a domestic or international flight.)
There are ways to cut costs for in-flight Wi-Fi. A number of airlines offer monthly subscription plans aimed at business travelers,
5. PICKING A SEAT
Once a free perk, many airlines now charge passengers a fee for selecting their seat in advance. On Spirit, for instance, seat assignments start at $5, but be prepared to pay a premium for a window, aisle, or seat with extra legroom. Meanwhile, some airlines like Lufthansa let you choose a seat free of charge beginning 24 hours before departure. (Of course, the best seats may already be snagged by passengers who paid extra for an advanced reservation.)
6. NON-ALCOHOLIC BEVERAGE
Traditionally, airlines have offered passengers a complimentary juice or soft drink and charged extra for an alcoholic drink but some carriers now also charge for non-alcoholic beverages. Case in point: discount airlines such as Frontier and Spirit charge for these beverages; they also charge for snacks. (So long, free peanuts!)
7. PILLOW OR BLANKET
Want to sleep tight on your next flight and enjoy the comforts of a complimentary pillow or blanket? Well, you may have to pay for these goodies. JetBlue charges $5 to $6 for a pillow and blanket, while American Airlines charges $8.
8. REDEEMING FREQUENT-FLYER POINTS
You should be rewarded for being a loyal customer, right? Not always. In fact, some airlines charge customers fees when they redeem frequent flyer miles. But whether you get hit with this type of fee depends on how and when you book.
Oftentimes, you have to pay a premium if you book a flight with the help of an agent. Some airlines also charge extra for “close-in bookings,” or reservations that are made a set number of days before the flight. American and United both charge $75 if you book a flight with airline miles less than 21 days out, while Spirit charges a $15 fee for tickets purchased more than 180 days prior to departure; if you use miles to book
8 Surprising Airline Fees You’d Better KnowTuesday — By Daniel Bortz Brudget Travel