Find Cheapest Flight

For hidden city search targeting Beijing specifically, use PEK as the --target flag passed to parse_results.py (not BJS — the API returns PEK/PKX in individual leg codes).

Step 2 — Direct flight search

1. Check for an open page: Call list_pages. If a page exists, use select_page with that page's ID. If no page exists, call new_page.

2. Navigate to trip.com search: Use the showfarefirst URL format (verified working as of 2026-03):

   https://www.trip.com/flights/showfarefirst?dcity=ORIGIN_LOWER&acity=DEST_LOWER&ddate=DATE&triptype=ow&class=y&quantity=1&locale=en-XX&curr=CNY
   

   Where ORIGIN_LOWER / DEST_LOWER are the IATA codes in lowercase (e.g. cdg, bjs).

   Example for CDG→BJS on 2026-05-21:

   https://www.trip.com/flights/showfarefirst?dcity=cdg&acity=bjs&ddate=2026-05-21&triptype=ow&class=y&quantity=1&locale=en-XX&curr=CNY
   

   If the page shows 404 or no results after 10 seconds, fall back to UI automation: navigate to https://www.trip.com/flights/, click the Flights tab, fill in the form, and click Search.

3. Wait for results: Call wait_for with text ["flights found", "¥", "$"] and a 10-second timeout.

4. Find the FlightListSearchSSE response: Call list_network_requests. The FlightListSearchSSE request is almost always one of the most recent requests (highest reqid). Check the last page of results first, or scan for FlightListSearchSSE in the URL column — do NOT page through all 300+ entries. Call get_network_request with responseFilePath to save directly:

   responseFilePath: /tmp/flight_direct.json
   

5. Parse the direct results:

   python3 ~/.claude/skills/find-cheapest-flight/parse_results.py \
     --response /tmp/flight_direct.json \
     --target PEK \
     --type direct \
     --format json > /tmp/parsed_direct.json
   

   Read /tmp/parsed_direct.json and store as direct_flights.

Step 3 — Hidden city search (parallel tabs)

Beijing is the real destination. Search onward cities and filter for itineraries where PEK appears as an intermediate stop.

Onward destinations to search: SHA, CAN, CTU, SZX

Phase A — Launch all 4 searches simultaneously (no waiting yet)

Open a new tab for each onward city and navigate immediately. Record each page ID.

tab_SHA = new_page → navigate_page: https://www.trip.com/flights/showfarefirst?dcity=ORIGIN_LOWER&acity=sha&ddate=DATE&triptype=ow&class=y&quantity=1&locale=en-XX&curr=CNY
tab_CAN = new_page → navigate_page: ...acity=can...
tab_CTU = new_page → navigate_page: ...acity=ctu...
tab_SZX = new_page → navigate_page: ...acity=szx...

Then call wait_for once with 10-second timeout — this single wait covers all 4 tabs loading in parallel in the background.

Phase B — Collect results from each tab

For each tab (SHA, CAN, CTU, SZX):

1. select_page with the tab's page ID
2. list_network_requests — find the FlightListSearchSSE request (highest reqid)
3. get_network_request with responseFilePath: /tmp/flight_hidden_SHA.json (use city code)
4. Parse:

   python3 ~/.claude/skills/find-cheapest-flight/parse_results.py \
     --response /tmp/flight_hidden_SHA.json \
     --target PEK \
     --type hidden \
     --format json > /tmp/parsed_hidden_SHA.json
   

5. Append non-empty results to hidden_flights list.
6. close_page to clean up the tab.

If a tab's FlightListSearchSSE is not found: call take_screenshot to diagnose, then skip. If trip.com shows a CAPTCHA on any tab: close that tab, wait 3 seconds, re-open as a new page.

Step 4 — Compile and display results

1. Merge all direct_flights, deduplicate by (flight_no, departure_time), sort by price ascending.
2. Merge all hidden_flights, deduplicate by (flight_no, departure_time), sort by price ascending.

Output format:

# ✈️  CDG → PEK   2026-05-21

## 直飞 / 普通中转
1. 🥇 MU557   CDG→PVG→PEK  ¥2,900  China Eastern  总时长15h30m
   ├ MU557  CDG(巴黎戴高乐) 10:00 → PVG(上海浦东) 05:30+1  [13h30m]
   └ MU5129 PVG(上海浦东) 07:30 → PEK(北京首都) 09:15  [1h45m，候机2h]

2.    AF129   CDG→PEK  ¥3,200  Air France  总时长10h  [直飞]
   └ AF129  CDG(巴黎戴高乐) 09:30 → PEK(北京首都) 06:00+1  [10h30m]

## 隐藏城市票（仅乘前段落地北京，放弃后续航段）
1. 🔥 CA856   CDG→PEK→PVG  ¥2,600  Air China
   ├ CA856  CDG(巴黎戴高乐) 13:45 → PEK(北京首都T3) 08:00+1  [落地即下机]
   └ ~~CA857 PEK→PVG 10:30~~  ← 放弃此段
   ⚠️ 警告：只能带随身行李；常旅客账户存在被航司处罚风险

(共找到 3 个结果)

关键要求：

• 每段航班单独一行，显示：航班号、出发机场代码+中文名、本地出发时间、到达机场代码+中文名、本地到达时间、飞行时长
• 中转等待时间标注在换乘行（"候机Xh Xm"）
• 价格统一用人民币 ¥，不显示美元
• 跨天到达标注 +1 / +2

If hidden_flights is empty, omit the hidden city section entirely.

Notes

• URL format: The showfarefirst URL with lowercase city codes is the verified working format. The old slug-based URL (/flights/paris-beijing-flight-CDG-BJS/) returns 404.
• SSE format: The FlightListSearchSSE response uses Server-Sent Events format (data: prefix per line). parse_results.py handles this automatically — no manual stripping needed.
• API structure: The parser supports both the current API (itineraryList / journeyList / transSectionList) and any legacy structure. No inline parsing needed.
• Rate limiting: If trip.com returns empty results or shows a CAPTCHA, wait 3 seconds before retrying.