# Southern Airways Express (9X): flights, fleet and features

> Airline Southern Airways Express (9X): fleet, alliance, popular routes and cheap flight search.

Southern Airways Express, LLC: United States, no alliance, fleet - about 40 aircraft.

Section: Home / Airlines / Southern Airways Express

## 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). 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=2026-10-10&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":"2026-10-10"}}}
- 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 airline

Southern Airways Express is a US regional airline headquartered in Addison, Texas, and part of the Surf Air Mobility group. Most of its routes are subsidised under the Essential Air Service programme, connecting small towns with major hubs.

## Details

- Full name: Southern Airways Express, LLC
- IATA: 9X
- ICAO: FDY
- Country: United States
- Alliance: none
- Fleet: about 40 aircraft

## Features

- Hubs: Memphis, Dallas, Pittsburgh
- Essential Air Service programme
- Part of Surf Air Mobility

## Hub cities

- [Memphis](https://aviaseek.com/en/cities/memfis-mem) - airports and flights: MEM

## Other catalogs

- [All airlines](https://aviaseek.com/en/airlines)
- [Airports](https://aviaseek.com/en/airports)
- [Cities](https://aviaseek.com/en/cities)

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Source: https://aviaseek.com/en/airlines/9x
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