Partner Flight Delay: Delta and KLM Codeshare Compensation Rules

Delta KLM codeshare delay compensation sits inside the transatlantic joint venture between Delta, KLM, Air France, and Virgin Atlantic. The four carriers share revenue, schedule capacity, and operational management on transatlantic routes (US to EU and UK). For the passenger, this means: Delta's app may show a flight, but KLM, Air France, or Virgin Atlantic may operate it. The marketing carrier (whoever sold the ticket) handles the booking interface. The operating carrier carries EU261 liability for delays and cancellations on EU-departing legs (KLM at AMS, Air France at CDG, Virgin Atlantic at LHR) and UK261 liability at LHR. Delta carries 2024 US DOT refund rule liability for tickets it sold, regardless of operating carrier.

Joint venture revenue sharing does not change the regulatory split. EU261 sits with operating carrier. US DOT sits with marketing carrier. File parallel.

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  Delta: US-based marketing carrier. Sells most US-originating tickets. Carries US DOT refund liability and 2024 rule deadlines.

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  KLM: Netherlands-based operating carrier on AMS-departing flights. Carries EU261 liability for AMS-departing delays and cancellations.

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  Air France: France-based operating carrier on CDG-departing flights. Carries EU261 liability for CDG-departing delays and cancellations.

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  Virgin Atlantic: UK-based operating carrier on LHR-departing flights. Carries UK261 liability for LHR-departing delays and cancellations.

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  Joint venture revenue share: profits and losses shared across the four carriers based on the bilateral agreement, but regulatory liability runs to the actual operating carrier under EU261.

See Delta KLM joint venture codeshare rules and skyteam codeshare rebooking rules.

EU261 Article 2(b) places the obligation on the operating carrier. On a Delta-marketed AMS to JFK return flight operated by KLM, EU261 cash compensation (EUR 600 long-haul) sits with KLM. KLM duty of care (hotel, meals, transport) sits with KLM. The Delta app may show 'rebooked' status from the joint venture's operational system, but the EU261 cash claim runs to KLM. Filing against Delta on EU261 produces a redirection or rejection. File directly against the operating carrier (KLM, Air France, or Virgin Atlantic) from day 1.

The 2024 DOT refund rule places the refund obligation on the marketing carrier. On a Delta-marketed return AMS to JFK flight cancelled and you decline the rebook, Delta owes the cash refund under US DOT. The 7-business-day federal deadline runs against Delta. Delta in turn settles with KLM through the joint venture revenue share. Filing the DOT refund against KLM produces a redirection back to Delta. File the DOT refund directly against Delta from day 1.

On the joint venture, a single booking record is shared across the four carriers. A passenger ticketed JFK to AMS to NCE round trip on Delta's website may have: Delta-operated outbound JFK to AMS (DL flight number), KLM-operated AMS to NCE (KL flight number under DL code), Air France-operated NCE to AMS return (AF flight number under DL code), and KLM-operated AMS to JFK return (KL flight number under DL code). Each leg's regulatory respondent depends on the operating carrier and the jurisdiction. A cancellation on the AMS to NCE leg triggers KLM's EU261 obligation. A cancellation on the JFK to AMS leg triggers no EU261 (US-departing) but does trigger US DOT against Delta if the passenger declines the rebook. See interline ticket cancellation: which airline pays compensation and codeshare flight rights 2026 guide.

A single multi-leg ticket can trigger four parallel claims against three different carriers. Map jurisdictions and operating carriers per leg before filing.

Take a Delta-marketed JFK to LHR round trip with the LHR to JFK return cancelled. Operating carrier on the cancelled leg: Virgin Atlantic. UK261 liability: Virgin Atlantic. Marketing carrier: Delta. US DOT refund liability: Delta (because Delta sold the ticket and the ticket is for US arrival). The passenger files: UK261 cash compensation (GBP 520 long-haul) against Virgin Atlantic, UK261 duty of care against Virgin Atlantic for any overnight or extended delay, US DOT cash refund against Delta if the passenger declines the rebook. Three parallel claims against two carriers. Total recovery: GBP 520 plus the ticket value back to original payment method, plus any documented loss under Montreal Convention Article 19 against Virgin Atlantic up to USD 7,300.

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  Delta app shows 'we are handling it': this is the joint venture's operational coordination, not Delta accepting EU261 liability. The EU261 claim still runs to the operating carrier.

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  Operating carrier customer service redirects to Delta: cite Article 2(b) and demand acknowledgement of the operating carrier's EU261 liability.

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  EU261 compensation paid in USD instead of EUR: KLM, Air France, and Virgin Atlantic typically pay in their home currency. Delta's USD payment is acceptable if the conversion is at fair rate; reject if the rate is unfair.

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  Voucher pressure on US DOT cash refund: Delta sometimes offers travel credit on cancellations. The 2024 rule explicitly requires written consent for substitution. Reject in writing.

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  Delayed processing on multi-leg bookings: the joint venture's internal billing can slow refund posting to your card. Track the federal 7-business-day deadline; escalate to DOT complaint on day 8.

1. 1

   Identify operating carrier on the disrupted leg from boarding pass or e-ticket.

2. 2

   Map jurisdictions: EU261 (AMS, CDG departures), UK261 (LHR departures), US DOT (US-handling marketing carrier), Montreal Convention (international).

3. 3

   File EU261 or UK261 cash compensation against the operating carrier (KLM, Air France, or Virgin Atlantic).

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   File US DOT cash refund against Delta if you decline the rebook.

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   File Montreal Convention Article 19 documented loss against the operating carrier if you have prepaid hotel, missed meeting, or other documented loss.

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   Track deadlines: 7 business days (US DOT credit card refund), 21 days (Article 31 notice), 2 years (Article 35 court action).

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   Escalate to CAA (Virgin Atlantic LHR), DGAC (Air France CDG), Luchtvaartautoriteit (KLM AMS), or DOT (Delta) if airlines refuse.

TravelStacks handles parallel multi-jurisdiction filings from a single intake. For the codeshare pillar, see codeshare flight rights: which airline responsible. For the broader business travel pillar, see business travel flight disruption compensation. Start a claim.