Delta might not have an industry-leading frequent-flyer program — and those constant, no-notice devaluations really need to stop — but the airline does have a reputation for one-upping its competitors on the in-flight product front, even when it comes to coach.Delta also offers select elite benefits to SPG members, much the same way as Marriott does with United. SPG Platinum members (and Marriott Platinums who have matched their status to SPG) benefit most, with the following perks when flying Delta:Priority check-inPriority (Zone 1) boardingUnlimited complimentary upgrades (though at the bottom of the upgrade priority list)Free first checked bagAs of this week, that third bullet also applies to Comfort+ upgrades — Delta recently added the following bit to its news page:Now, Starwood Preferred Guest (SPG) Platinum Preferred Members enrolled in the Crossover Rewards program traveling on Delta flights will clear for Complimentary Upgrades to both First Class and Delta Comfort+ based on their SPG tier level on paid tickets. For more information on how to opt-in for Delta Comfort+ upgrades, visit Complimentary Delta Comfort+ Upgrades.Delta Comfort+ seats include extra legroom, and passengers receive a free alcoholic beverage and improved snacks on many flights. Note that these upgrades only apply to paid tickets, and will only be processed on the day of departure, so SPG members (in theory) shouldn’t be taking Comfort+ seats away from Delta elites.If you’re an SPG Platinum member, be sure to link your account with Delta — it only takes a couple of minutes. For more on the Delta/SPG partnership, see 4 Steps to Maximize Starwood Crossover Rewards with Delta.Have you scored a Delta upgrade as an SPG Platinum?Sign up for our daily newsletterEmail addressSign upI would like to subscribe to The Points Guy newsletters and special email promotions. The Points Guy will not share or sell your email. See privacy policy.H/T: RenesPoints