ctrip-flight

This skill should be used when the user wants to search for domestic flight tickets in China, query flight prices, find the cheapest flights, compare airline prices, or get low-price calendars. Trigger phrases include 查机票, 航班查询, 机票价格, 最低价, flights, cheap flights, 北京到上海机票, or any mention of Chinese city pairs with travel dates.

Ctrip Domestic Flight Search

Search domestic flight tickets via Ctrip's API. Provides real-time flight information including prices, airlines, schedules, aircraft types, and low-price calendars.

Prerequisites

Install the required Python package before first use:

bash

pip install quickjs

The skill also requires the _extract/c-sign.js file bundled in the scripts/ directory.

Usage

Run the search script located at scripts/ctrip_flight.py. Both departure and arrival support city names, IATA codes, or province names. When a province is specified, all airports in that province are queried and compared automatically.

bash

python3 scripts/ctrip_flight.py 北京 上海 2026-04-02 --md
python3 scripts/ctrip_flight.py 北京 广东 2026-04-02 --md
python3 scripts/ctrip_flight.py 浙江 云南 2026-04-05 --json

Parameters:

• Arg 1: departure — city name, IATA code, or province name
• Arg 2: arrival — city name, IATA code, or province name
• Arg 3: departure date in YYYY-MM-DD format
• Arg 4 (optional): cabin — Y = Economy (default), C = Business, F = First
• --json or -j: output structured JSON
• --md or -m: output Markdown tables (default)

When a province is given (e.g. "广东"), the script queries all airport cities in that province (广州, 深圳, 珠海), compares prices across routes, and recommends the cheapest option.

Examples:

bash

python3 scripts/ctrip_flight.py 北京 上海 2026-04-02
python3 scripts/ctrip_flight.py 广州 成都 2026-04-05 C

Programmatic Usage

python

import sys
sys.path.insert(0, "path/to/ctrip-flight/scripts")
from ctrip_flight import search_to_region, to_json, to_markdown

# Single city or province query — province auto-expands to all airports
result = search_to_region("北京", "广东", "2026-04-02")

# result contains:
#   query.isMultiRoute  — True if province was used
#   routeSummaries      — per-route lowest price comparison
#   bestRoute           — the cheapest route overall
#   allFlights          — combined flight list from all routes

md = to_markdown(result)
js = to_json(result)

Supported Locations

Cities: 北京, 上海, 广州, 深圳, 珠海, 成都, 杭州, 温州, 宁波, 武汉, 西安, 重庆, 南京, 天津, 长沙, 三亚, 海口, 昆明, 丽江, 西双版纳, 厦门, 福州, 大连, 沈阳, 青岛, 济南, 哈尔滨, 长春, 郑州, 贵阳, 太原, 兰州, 乌鲁木齐, 南宁, 桂林, 合肥, 南昌

Provinces (auto-expand to all airport cities): 广东(广州/深圳/珠海), 浙江(杭州/温州/宁波), 福建(厦门/福州), 山东(青岛/济南), 辽宁(大连/沈阳), 海南(三亚/海口), 云南(昆明/丽江/西双版纳), 广西(南宁/桂林), 黑龙江, 吉林, 河南, 湖北, 湖南, 江苏, 江西, 安徽, 陕西, 四川, 贵州, 山西, 甘肃, 新疆

Output

Two output formats are supported:

Markdown (--md, default): Renders flight data as Markdown with tables and summary. Ideal for LLM responses and chat display.

JSON (--json): Structured JSON with query, summary, directFlights, transferFlights, and lowPriceCalendar fields. Ideal for downstream processing.

How It Works

The skill reverse-engineered Ctrip's anti-crawl protections:

• sign header: MD5(transactionID + cityCode + cityCode + date)
• w-payload-source header: Ctrip's c-sign.js executed via QuickJS engine
• FVP cookie: Extracted from server-rendered HTML page
• token header: Not required (discovered via testing)