Claude Duet's fare search fell back on him to run
Prafull gave Claude Duet two weeks with one rule: if he has to do the legwork, what's the point. It did a lot on his side projects, but personal jobs went less well. He asked for the cheapest and fastest flights for a multi-city trip to India and Thailand. Duet wrote a fare search script packed with his criteria, but it couldn't reach any source beyond Google Flights, so he ended up running the script himself again and again. It also couldn't connect to his Instagram saved posts at all. His takeaway: the agent built things well but was weaker at knowing when a job was really done, and when it hit a wall the work slid back to him.
The lesson: If an agent can't reach the sites it needs, it will hand the work back. Ask up front which sources it can actually use.
Copy this prompt
I want to fly [CITY A] to [CITY B] to [CITY C] and back, leaving around [DATES], [ECONOMY], up to [ONE] stop. Before you search, tell me which flight sites and airline sites you can actually open from your browser. Then compare the cheapest and the fastest options across those sources, and show total price, total travel time and layovers in one table. If you can only use one source, say so clearly instead of writing a script for me to run.
Our own prompt, written from what the source describes. We haven't run it ourselves. Text in [BRACKETS] is what you replace.
Watch out for
- Multi-city trips are often cheaper booked as one ticket than as separate legs. Ask the agent to price both.
- Prices on one search site aren't the whole market. Check the airline's own site before you book.
- If the agent says it can't reach a site, it won't magically fix that later in the same chat.
Where this comes from
Original post by @prafull on X, Nov 8, 2026. We rewrote it in our own words. Check the original for the full context.
Read the originalWant to do this yourself?
Our guide compares which agents can do this job, with steps and a prompt.
Track flight prices and get told when they drop
You know where and when you want to fly. An agent can watch prices and tell you when it's a good time to book.