Additional luggage fee from US to Europe with a domestic connection

I have a single ticket from Little Rock, AR airport to Paris CDG (France).
Reservation was done on Air France website, first flight is operated by Delta from Little Rock to Atlanta and has a DL tracking code, while the second is Air France operated with an AF code.
I wish to bring an additional luggage (1 carry-on and 2 checked), so I'll have to pay a fee.
However, do I need to pay the fee twice or do Air France and Delta have a baggage agreement and I'll only pay it to Delta ? I couldn't find this information online, was only able to find the fees.
Thanks
Best Answer
Generally you will pay the carrier your purchased from. When doing your online check-in, if you see the option of buying additional luggage, then you can do it there and just bring the receipt (although it will be on file too) when you go to the airport to get your luggage tags.
Now, if the option is not offered to you, you will pay it at the check-in counter which will be the one from Delta. Luggage fees are per way, so you will be 1 or 2 pieces (depending if your ticket had 0 or 1 in its included allowance). You will pay a similar fee on your return, either again when checking-in with AF or at the Air France counter, since they operate the first lag of your return flight.
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Do I have to pay 2 baggage fees for connecting flights?
Baggage basics Baggage fees are per bag and per direction. So one way = one charge. Round trip = two charges. If your flight has a connection, bags will generally transfer from flight to flight and no additional fees will apply.How much does extra baggage cost on domestic flights?
Should your baggage exceed the limitations of the Free Baggage allowance, an excess baggage charge needs to be paid. For Domestic sectors within India, the excess baggage rate is INR 600 plus applicable GST per kg.Do you have to recheck baggage on connecting flights domestic?
When you purchase a layover flight, you will need to claim your bags when you land at your layover destination, and recheck them the next day when you continue your flight(s).Do you have to recheck baggage on connecting flights in Europe?
Make Sure to Recheck Your Bags on International Transfers Arriving international passengers with a boarding pass (not to mention always having your passports/and or visa on you at all times!) go through customs and then must recheck their baggage at a counter or machines before going to their connecting flights.5 Ways to Avoid Baggage Fees
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