How JetBlue’s takeover of Spirit could change air travel

Spirit Airlines relented this week and agreed to sell itself to JetBlue Airways for $3.8 billion, hours after breaking off a merger agreement with Frontier Airlines that failed to win enough shareholder support.

The new deal would mean big changes for travelers if it passes regulatory hurdles.

JetBlue has earned a reputation for passenger comforts like relatively generous legroom, seatback screens, live television, free Wi-Fi, and complimentary snacks like Cheez-Its and Stellar vegan butter pretzel braids. It also offers business class, with lie-flat seats.

Spirit, by contrast, has become a punchline for its bare-bones service. The cabins in its bright yellow planes are more cramped, and passengers have to pay extra for “optional services” like carry-on luggage and getting to pick a seat.

“It’s historic. This is the first time anyone wanted Spirit Airlines,” quipped “The Late Show” host Stephen Colbert about the deal on Thursday.

Still, Spirit has expanded rapidly and profitably by offering cheap tickets to vacation hotspots that can sometimes run less than a trip to the movies or a few burgers. The airline’s “Big Front Seat,” however, does offer 36 inches of legroom for a surcharge of up to $250.

As the two distinct airlines push ahead with their plans to combine, here’s what passengers can expect:

JetBlue wants to get bigger, and Spirit has the planes and pilots to help it do that. The New York-based carrier plans to retrofit Spirit’s planes in JetBlue’s style, ripping out the packed-in seats for a roomier layout with more amenities.

Combined, the airlines would become the country’s fifth-largest carrier, behind American, Delta, United and Southwest. Both have a big presence in Florida and each has expanded into Central and South America as well as the Caribbean in recent years. JetBlue last year started flying to London.

The two carriers will continue to operate as separate airlines until after the deal closes, which is subject to regulatory approval. Afterward, passengers might be confused if they’re flying in Spirit planes that haven’t been retrofitted yet.

JetBlue has some experience with such situations through its alliance with American in the Northeast, which allows the carriers to sell seats on each others’ planes. Last year, JetBlue revamped its website to better highlight the differences in onboard features like business class seats or free Wi-Fi.

Despite comedians’ digs, Spirit has improved its reliability in recent years — and is faring better than JetBlue by some measures.

JetBlue came in last among 10 airlines in on-time arrivals this year through May, while Spirit ranked seventh, according to the Transportation Department’s latest available data.

So far this year, a third of JetBlue’s flights were delayed and 4% have been canceled, according to flight tracker…