American & Delta Restore Their Interline Agreement

In September 2015, American and Delta discontinued their interline agreement. An interline agreement is one of the lowest levels of cooperation between airlines, as it’s less involved than a joint venture, an alliance, a partnership, or a codeshare agreement.

An interline agreement simply allows tickets to be sold on multiple airlines, and allows an airline to rebook you on another airline in the event of irregular operations.

Interline agreements are standard industry agreements, and the reason that American and Delta cut their interline agreement was because Delta was unwilling to agree to the standard terms. Per a memo sent to American employees at the time:

One tool that we use to help get customers back on their way during irregular operations are the interline agreements we have with various carriers that allow us to reaccommodate passengers on other airlines at a negotiated rate. These agreements also allow airlines to book, sell, ticket, and check baggage on one another. Interline agreements are common across the industry and they generally include a standard, discounted rate for calculating how much is owed by one carrier to another to use their seats during irregular operations.

In April of this year, participating airlines across the industry agreed to new rates for moving customers between carriers during irregular operations. Delta recently decided to go outside of that joint agreement and negotiate an individual agreement with American. We have been unable to come to terms on an agreement with Delta and, as a result, have mutually agreed to end our interline agreement effective September 15. From that date, neither airline will offer interline services to each other, including the ability to rebook passengers at discounted rates on the other carrier when flight disruptions occur. (Note that we will continue to honor valid tickets already purchased on or before September 14 through the existing interline agreement, so there will be no changes there.)

Delta considers themselves to be the “on-time machine,” so since they had better operational performance than other US carriers, they decided they didn’t need to help other airlines when things go wrong. The irony is that in the past couple of years Delta has had some of the biggest operational meltdowns of any US airline, and they really screwed their customers with the lack of an interline agreement, since they couldn’t rebook people on other airlines.

Well, there’s some good news on this front. As noted by the always knowledgable @xJonNYC, American and Delta are restoring their interline agreement as of today, Wednesday, January 24, 2018. Per a memo:

The reinstatement of the Delta agreement adds another tool to help us reaccommodate customers impacted by disruptions; however, we should continue to work to keep American customers on American.

In the event this is not possible, every effort should be made to reroute using a Joint Business carrier or oneworld partner first.

Please use the existing protection order below as guidelines:

  • American
  • Joint Business carrier
  • oneworld partner or non-oneworld partner
  • Other airlines (including Delta)

No phone call is required to Delta to confirm availability.

Presumably this is reciprocal, meaning that Delta will be able to rebook passengers on American in the event of irregular operations as well.

This is fantastic news. While the priority is always to rebook passengers on American or partner airlines first, keep in mind that American doesn’t have any major partners within the US, with the exception of Alaska. So if there are irregular operations on American and they can’t get you there on American or Alaska, they should be able to rebook you on Delta.

This is fairly minor in the grand scheme of things, though is a step in the right direction.

I’d be curious to know what prompted this policy change. I’m not sure if Delta’s hubris has been put into check after all of their operational issues, or what.

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carol Guest

Lucky, Is there any way to find out what airlines have interline agreements with other (and which) airlines. I have been told by some agents that airline X can't rebook me on airline Y because they don't have an agreement only to be rebooked on Y after speaking with a different agent! Sure would be nice to be armed with the interline info pro-avtively.

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JD Guest

The past year was nice to see DL knocked down a peg and finally realizing that (GASP) they are susceptible to IROPs just like everyone else.

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Chad S New Member

@ah As a general rule, you need to request "original routing credit" from the carrier you bought the ticket from, and they'll issue you the miles/segments/etc as originally purchased. I've not had luck with this happening automatically, and usually have needed to call/email/tweet to request it

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Andrew B Guest

@flightwonk - AA isn't required to rebook you on another carrier in most cases. Like most things in air travel, it's really more about how much they like you (status/revenue), or how much additional you will cost them (vouchers/lost business). Most airlines will not rebook you in situations outside their control (ie. weather), unless of course, you are very valuable to them.

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flightwonk New Member

@Lucky - one thing I’ve wondered about interline agreements is whether there are any time parameters on using a partner. In other words, if I’m booked on an American flight and get massively delayed because of IRROPS, and (1) they tell me they can’t get me out until the next day on an AA flight and (2) there’s same-day space on a DL flight, what obligation do they have to put me on the DL flight? Can I demand that they do so?

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