whentofly
Find the cheapest round-trip flights across flexible date windows with price context.
Searches economy and business flights across multi-month date ranges with minimum and maximum trip lengths. Resolves city and airport names, returns the cheapest options sorted by price, and supports one-way and round-trip searches with optional filters for transfers and cabin class.
Try asking Muse: "Find me the cheapest flights from New York to Europe anytime in September through November for 10 to 15 days."
Source: Found in the official MCP Registry (io.github.dimabalony/whentofly) · First listed September 24, 2026
Last 24 hours
Each bar is one check, every 15 minutes. Green means it answered. Last checked 2 h ago.
Is it safe to connect?
What Muse can see: It does not ask you to sign in, so it cannot see your accounts. It only sees what Muse sends it from your request.
Before it acts: Read what Muse plans to do before you approve it, and remove the app from Muse when you stop using it.
musedirectory.ai is not part of Meta. More about how Muse handles your information
How to add it to Muse
Not in Muse's Connectors list yet, but Muse can still use it. Copy the request below and paste it into Muse. Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
https://whentofly.io/mcp?ch=mcp-registryNot in Muse's Connectors list yet. Muse can still use it: its page gives you a request to paste into Muse.
Technical details: safety screening, tools, response time and recent checks
Response time at the last check: 547ms. Worked in 94.8% of checks over 30 days.
Screening · September 24, 2026
Screened, no issues found
Screening looks for known threats and hidden instructions at the time of the check, and runs again weekly and whenever the tool list changes. It cannot see the server's code, so only connect what you need and review what Muse asks to do. How screening works.
Tools · 2
search_locationsResolve a city or airport name or code before searching flights. Returns typed values such as city:SHA to search every catalog airport in Shanghai or airport:SHA for Hongqiao only. Pass the selected value unchanged to search_flights. Ask the traveler when multiple results are plasearch_flightsFind the cheapest round-trip across a FLEXIBLE multi-month date window with a min/max trip length — e.g. "10–15 days, anytime Sep–Nov". Search a broad date window rather than requiring the traveler to choose exact dates first. First call the search_locations MCP tool for city or Recent checks
Link
https://whentofly.io/mcp?ch=mcp-registryQuestions about whentofly in Muse
How do I connect whentofly to Muse?
Not in Muse's Connectors list yet, but Muse can still use it. Paste this into Muse: "Use whentofly to help me. It is a free service with an MCP server at https://whentofly.io/mcp?ch=mcp-registry. It does not need an API key. Ask me before you share anything with it." Muse asks before it shares anything with the app's site. Meta does not review apps used this way, so only use ones you trust. We tested this in the Muse app on September 24, 2026: Muse used an app's link directly this way and returned a live answer.
Is whentofly working right now?
At the last check (September 28, 2026, 07:16 UTC) the endpoint was working, answering in 547ms. Over the last 7 days it answered 94.8% of health checks. It is checked every 15 minutes.
Is whentofly safe to connect to Muse?
It was screened on September 24, 2026 with the result "screened, no issues found". Screening checks the domain against threat feeds and reads the tools for hidden instructions and requests for passwords or card numbers. It cannot see the server's code, so grant only the access you need.
What can whentofly do in Muse?
It exposes 2 tools, including search_locations, search_flights. For example, you could ask Muse: "Find me the cheapest flights from New York to Europe anytime in September through November for 10 to 15 days."
Follow whentofly
Made this app? Claim it or get a status badge
Is this yours?
This listing was added from public sources (Found in the official MCP Registry (io.github.dimabalony/whentofly)). If you build whentofly, claim it to correct the details and get your badge.
Paste this on your site or README. It always shows the latest check.
<a href="https://musedirectory.ai/connector/whentofly"><img src="https://musedirectory.ai/badge/whentofly.svg" alt="whentofly on musedirectory.ai" width="236" height="40"></a>