Who is Responsible for Lost Luggage on Connecting Flights in 2026?

VeloxTravel Editorial · Updated 2026

Lost luggage during connecting flights can be a traveler's nightmare, especially when navigating codeshare and interline agreements. Understanding airline liabilities is crucial for securing compensation in such scenarios. In this article, we’ll break down who is responsible for your lost luggage and how to effectively claim compensation during multi-leg trips.

What Are the Key Differences Between Codeshare and Interline Flights?

Codeshare flights occur when two or more airlines share the same flight, using one flight number for booking purposes. In contrast, interline agreements involve separate airlines working together to facilitate passenger and luggage transfers. While both methods can simplify travel, accountability for lost luggage may vary. In codeshare situations, the airline operating the flight is typically liable, while interline agreements may require coordination between carriers for claims.

ScenarioTimeframe / AmountWhat You Can Claim
Lost luggage on a codeshare flight21 daysUp to €1,600 (EC Regulation 261/2004)
Delayed luggage on interline flights21 daysCompensation varies; check each airline’s policy
Domestic flights (U.S.)14 daysUp to $3,500 (DOT regulations)
International flights (Montreal Convention)21 daysUp to $1,700
Claims filed after 21 daysNo liabilityNot eligible for compensation

How Do I File a Claim for Lost Luggage on Multi-Leg Trips?

To file a claim for lost luggage, first report the issue at the airline's baggage service desk immediately upon arrival. Obtain a Property Irregularity Report (PIR) and keep a copy. If your trip involved multiple airlines, contact each airline to determine which is liable and follow their specific claim procedures. Be sure to keep receipts for any items you purchase while waiting for your luggage, as many airlines reimburse necessary expenses during the delay.

What Are My Rights When My Luggage Is Lost?

You have rights under various international and domestic laws regarding lost luggage. For instance, under the Montreal Convention, you can claim compensation for lost luggage up to about $1,700. Airlines are obligated to provide timely updates on the status of your luggage, and you should file your claim within the specified timeframe to ensure eligibility for compensation.

What Should I Do If My Airline Refuses to Compensate Me?

If your airline refuses compensation, escalate your case. Start by contacting their customer service department, referencing your PIR and any relevant documentation. If unresolved, file a complaint with the relevant aviation authority, such as the DOT in the U.S. or the CAA in the UK. Keep a record of all communications for future reference.

Insider Tip: Always document your travel journey with receipts and photos. This will strengthen your case when claiming compensation for lost luggage, especially in complex multi-leg trips involving multiple airlines.

What should I do first if my luggage is lost?

Report the loss at the airline's baggage service desk immediately and obtain a Property Irregularity Report (PIR). This document is crucial for filing claims.

How long do airlines take to locate lost luggage?

Most airlines aim to locate lost luggage within 21 days, after which they may consider the bag officially lost and liability shifts to compensation.

Can I claim for delayed luggage expenses?

Yes, you can claim for essential expenses incurred due to delayed luggage, but it's vital to retain all receipts and submit them to the airline as part of your claim.

Useful resources: Track your bag via WorldTracer and compare travel insurance at World Nomads.