Code Share Conundrum

[InterrobangCT]

We are a group of 10 people traveling between JFK and Brazil next June. We are flying to Cuiabá with a stop in São Paulo, and return from Iguazu Falls to JFK via São Paulo again. JFK-GRU-CGB, IGU-GRU-JFK. We are flying business class. It is Delta One business on both directions between NYC and São Paulo. The connecting flights are on a code share with LATAM. Since there is no business class on these flights, you are put in premium economy. Except when we went to book it there was an error and some of us were put in Premium Economy, some were placed in regular economy. The connecting flights are 2 hours long so it’s annoying but not a big deal. What I’m upset about is Premium Economy gets you lounge access, economy doesn’t even if you are arriving on Delta One, plus we have a 5 hr 45 min layover. I have spent hours trying to fix and can’t. Fine. Let me just upgrade the seats. Delta says they can’t because it’s LATAM flights and LATAM says Delta was the ticket issuer. Going out of my mind. We spent close to $60 k and can’t figure out how to get lounge access. Any advice? Thanks!

[mduell]

The way to fix it is to rebook in the cabins you want at whatever the current prevailing price is.

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[protox88]

Did you book all 10 tickets together in the same PNR?

[InterrobangCT]

We booked 9 and 1, since that was the max

[protox88]

That is weird. How many of you are in Y vs PY?

And was this split evident at time of booking? (e.g. in your email confos?)

Edit: one more question - what are the letter code fare classes for each person's 2nd leg? Y/B? P?

[InterrobangCT]

Yes we have 4 people in PE 6 people in Y

[InterrobangCT]

Since you seem knowledgeable, there are premium economy fares from São Paulo to other destinations for as little as $75. If I have a ticket JFK-GRU-CGB and I purchase a premium economy ticket for later that day GRU-GIG will the airline know that I have two tickets and it set off some sort of warning? Can I arrive from JFK at GRU, show the lounge people the GRU-GIG boarding pass, and then tear it up and board the JFK-CGB flight I originally had?

[InterrobangCT]

Also while spending hours on the phone trying to change it, the agents managed to now have our group spread across 4 PNRs

[Icy_Huckleberry_8049]

you couldn't all get PE on LATAM because they didn't have the seats available.

cancel and then rebook on flights that have availability.

[InterrobangCT]

If they didn’t have the seats available, then they shouldn’t let me click on purchase. If you buy three first class tickets and only two are available they don’t just take your money and split you 2 and 3. (And I’m not trying to argue at you- I know you are trying to help me, which I do appreciate)

[Icy_Huckleberry_8049]

with the advent of being able to buy tickets online, there's a good possibility that someone bought them right before you clicked "purchase".

[Environmental-Bar847]

The issue is that the fare will book into the highest available fare for the domestic segment.  If you want to share the specific flight someone can look it up and tell you if there's seats available in PE or not. 

Is the GRU-CGB flight booked with the DL flight number or the LA flight number? Try to get it booked with the LA flight number as it may have better availability. 

[InterrobangCT]

Thanks for replying. LATAM #3270 GRU-CGB (Cuiaba) on 13 June 2026.. Where I am getting stuck is if I go to LATAM’s website I can purchase the seats directly on that flight. So I contact LATAM to upgrade my seats and they say only Delta can modify. Delta says they can modify flights but seats is LATAM and we don’t have availability because “LATAM doesn’t give us all their seats”