Anything can happen while you’re traveling. The best-laid plans have to stay flexible, especially when you’re dealing with airline schedules and ever-changing TSA rules. Mobile apps can help you when you need to change your plans on the fly. For every aspect of air travel, here are some of the best air-travel apps out there, listed to help you easily find the ones that work on your mobile device:

Airline-Specific Apps

If you have a favorite airline, it helps to get that airline’s own free app onto your device, so you can easily check for delays, cancelations, and frequent flyer perks. Many airlines have apps for all devices, although some just cater to Android and Blackberry users. For example:

• Southwest Airlines apps come in Android, Apple, and Blackberry versions.

• JetBlue just launched their first app for the iPhone. Android is coming soon, we hear.

• American Airlines apps are for all of the big three, plus Windows phones and the Barnes & Noble Nook.

• Delta makes apps for Apple, Android, and Blackberry devices.

• So far, Continental only offers apps for Apple and Android devices.

Apple Devices, Android, and Blackberry

• TripIt organizes all of your travel confirmation emails, including those for flights, car rentals, and hotel reservations, into one easy-to-read itinerary. You can easily share your plans via Facebook and LinkedIn, too.

• FlightAware lets you check the status of flights on multiple airlines worldwide. Find out whether your flight (or the flight your colleagues, family, or friends are on) is delayed, canceled, running early, or changing gates.

• TaxiMagic works with cab companies in most major cities. It lets your mobile device call a the nearest available cab, track the cab’s progress and arrival time, and even charge your fare, if you choose.

Apple and Android Only

• GateGuru is your guide to everything inside airports. Whether you’re killing time on a long layover or rushing to get a good book and a bite to eat before your flight boards, GateGuru will show you the best shops, restaurants, and extras in the airport you’re at.

• HotelTonight will save you if you’re suddenly stuck far from home for the night, or if you like to book hotel rooms on the go. It will find you last-minute discounts of up to 70 percent on rooms around the United States. You can book directly from your smartphone.

Apple Only

• FlyersRights, which is sadly only available for Apple devices (as of this writing), was created by the nonprofit FlyersRights.org. This app will show you the latest flyers rights laws, safety information, and numbers to call in various difficult air-travel situations.

• MyTSA gives your Apple device access to the TSA’s constantly changing rules. Can you pack that in a carry-on today? What types of ID do you need? What should you wear to get through security as quickly as possible? All of the answers are now available on your iPhone.