Quick Points: Get bonus miles if your checked bag arrives late

There are downsides to checking your luggage. Namely, it can sometimes take an extremely long time for luggage to arrive at the baggage carousel. Or even worse, luggage might not show up at all.

Most of the time, luggage eventually arrives. However, if it takes more than 20 minutes from when your flight arrives at the gate to when your luggage arrives at the baggage claim, you may be eligible for compensation if you are flying Alaska Airlines or Delta Air Lines.

What is a 20-minute baggage guarantee?

On most domestic Alaska and Delta flights, you are guaranteed to have your luggage at the carousel within 20 minutes of your plane's arrival at the gate. Delta and Alaska will usually compensate you if your luggage isn't at the carousel within 20 minutes.

Of course, there are terms of the guarantee that are important to keep in mind. Check out our guide on earning bonus miles with checked bag guarantees for all the details. For example, one key term is that you only get compensated at the predetermined rate once, regardless of the number of bags you've checked.

Related: I always check a bag – and I'm proud to admit it

How much compensation is offered?

Assuming you meet the guarantee terms, both airlines offer similar preset compensation amounts.

Delta Air Lines offers you 2,500 SkyMiles (worth $35.25 based on TPG valuations).

Meanwhile, Alaska offers a choice of 2,500 Mileage Plan miles (worth $45) or a $25 discount code for use on a future Alaska Airlines flight. Even though the miles are "worth" more, I would opt for the discount code. After all, Alaska miles have been losing value, and I would rather have straight cash off my next flight (not to mention that you can earn miles on a cash flight).

Related: How to avoid checked baggage fees on major domestic airlines

How do I get the compensation?

Applying for compensation is easier with Delta than Alaska. Delta has a dedicated baggage guarantee landing page on its website with a simple form to fill out. After filling in the seven required fields, you can submit the form, and a Delta customer care representative will review the case. If approved, you'll immediately have 2,500 SkyMiles deposited to your account.

On the other hand, Alaska requires you to speak to a customer service representative at the airport within two hours of your flight's arrival. The last thing that any traveler wants to do is get in a baggage service line after already waiting over 20 minutes for their luggage. Hopefully, Alaska will soon provide a simple form like Delta to apply for compensation without speaking with an Alaska employee in the airport.

Related: Large and lavish: A review of the Briggs & Riley Extra Large Expandable Spinner suitcase

Bottom line

You may be able to easily score some extra miles or a discount code the next time your luggage is late on Delta or Alaska. Don't forget that there are plenty of ways to avoid baggage fees on Delta and Alaska. Whether or not you paid to check your bag, you're still eligible for compensation if your bag is late.

As a frequent Delta traveler, TPG's Andrew Kunesh has earned around 25,000 SkyMiles from late luggage on Delta flights in the last several years. That's enough miles for a round-trip flight from New York City to the Dominican Republic.