Earlier this year, Alaska Airlines offered 10,000 bonus miles to customers who linked their Alaska Mileage Plan and Virgin America Elevate accounts. Virgin America will cease to exist sometime in 2019, so Alaska Airlines wants its flyers to join the Alaska Mileage Plan. If you aren't a member of the Alaska Mileage Plan already, you can take advantage of a new member bonus that the airline is offering.

Yes, between now and April 30, 2017, just by signing up and taking a flight, you will receive 5,000 Mileage Plan miles as a welcome gift. You must complete a flight on either Alaska Airlines or Virgin America by September 30, 2017.

While, 5,000 miles might not seem like a lot, you can actually take some short flights with the miles. 5,000 miles will get you a one-way ticket of up to 700 miles, which is enough for a one-way flight between San Francisco and Los Angeles.

With Mileage Plan, you have a lot of flight options considering that you can fly with both Alaska Airlines and Virgin America. With 1,200 daily flights to 118 destinations in the U.S., Canada, Mexico, Costa Rica and Cuba, flyers have plenty of choices when the time comes for them to use up those miles.

You should consider joining Mileage Plan if you aren't already a member of Alaska Airlines' frequent flyer program. Not only can you earn 5,000 bonus miles and have access to over 100 destinations, but also Mileage Plan is a great program - unlike other U.S. airline loyalty programs, you earn miles based on how far you fly, and not just on how much you spend, on both Alaska Airlines and Virgin America flights.