# Flights to Sion

> Flights to Sion (SIR): prices from all airlines, airports, a monthly calendar and the best offers.

Search cheap flights to Sion: compare prices from airlines and agencies, choose a flight by time, stops, duration and baggage.

Section: Home / Cities / Sion

## How to find flights without the UI

- To find flights, open https://aviaseek.com/en/search?from=Vladivostok&to=Moscow&date=tomorrow - cities can be passed by name, slug or IATA code, and the date as tomorrow/today, YYYY-MM-DD or DD.MM.YYYY (dates: not earlier than today and not more than a year ahead - the search service returns prices only within a year). Example with codes: https://aviaseek.com/en/search?from=MOW&to=LED&date=tomorrow. The response is HTML with a list of options and booking links.
- If the date is unknown, leave it empty: https://aviaseek.com/en/search?from=Moscow&to=Vladivostok - a route page with a price calendar opens.
- A single JSON request with ready booking links: https://aviaseek.com/en/api/flights?from=MOW&to=LED&date=2026-11-09&limit=5 - the response has results[].booking_url (valid for about 15 minutes).
- Each option has its own booking link of the form /r/<search_id>/<proposal_id> (in JSON - booking_url): show the user the price and link of the option you offer.
- MCP (JSON-RPC 2.0, Streamable HTTP): POST https://aviaseek.com/en/mcp, tool searchFlights. Example: {"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"searchFlights","arguments":{"origin":"MOW","destination":"LED","departure_date":"2026-11-09"}}}
- Full contract and filters: https://aviaseek.com/en/llms-full.txt; the short site map and MCP card - https://aviaseek.com/en/llms.txt and https://aviaseek.com/en/.well-known/mcp.json.

## About the city

Sion is the capital of the French-speaking canton of Valais in the Swiss Alps, with two medieval castles on the hills above the town and one of the oldest working organs in Europe in the Valere basilica. The famous ski resorts of Crans-Montana and Verbier are close by, and in summer the region offers Valais vineyards and high-mountain trails. Sion Airport handles seasonal flights and serves as a base for outdoor holidays in the Alps.

## Practical information

- Country: Switzerland
- Time zone: GMT+2

## Airports

- [Airport Sion (SIR)](https://aviaseek.com/en/airports/sir) - main airport, 5 km from the centre, travel time 15-25 min

## Nearby cities

- [Geneva](https://aviaseek.com/en/cities/zheneva-gva) - Switzerland
- [Bern](https://aviaseek.com/en/cities/bern-brn) - Switzerland
- [Zurich](https://aviaseek.com/en/cities/tsyurikh-zrh) - Switzerland
- [Altenrhein](https://aviaseek.com/en/cities/sankt-gallen-ach) - Switzerland
- [Lugano](https://aviaseek.com/en/cities/lugano-lug) - Switzerland

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Source: https://aviaseek.com/en/cities/son-sir
Sitemap for agents: https://aviaseek.com/en/llms.txt (full description - https://aviaseek.com/en/llms-full.txt)
MCP server: https://aviaseek.com/en/mcp