LeetCode 332: Reconstruct Itinerary — Step-by-Step Visual Trace

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Reconstruct an airline itinerary from a list of tickets using a step-by-step visual approach

intermediate Published 9 Apr 2026
Action Steps
  1. Build a graph data structure to represent the airline tickets
  2. Run a depth-first search (DFS) algorithm to traverse the graph and find a valid itinerary
  3. Configure the DFS to start from JFK and use all tickets exactly once
  4. Test the solution with sample inputs to verify its correctness
  5. Apply the solution to real-world airline ticket data to reconstruct itineraries
Who Needs to Know This

Software engineers and developers working on travel or logistics projects can benefit from this solution to efficiently reconstruct itineraries from ticket data

Key Insight

💡 Using a graph data structure and DFS algorithm can efficiently reconstruct an airline itinerary from a list of tickets

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🛫️ Reconstruct airline itineraries from ticket data using DFS and graph traversal! 💻

Key Takeaways

Reconstruct an airline itinerary from a list of tickets using a step-by-step visual approach

Full Article

Given a list of airline tickets represented as pairs of departure and arrival airports, return the itinerary in order starting from JFK, using all tickets exactly once.
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