# Fly Dreamz – Cal.com booking page

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Booking page: https://cal.com/flydreamz

## Event types

- [What Is the Cheapest Day to Book KLM Flights? Expert Guide 2025](https://cal.com/flydreamz/what-is-the-cheapest-day-to-book-klm-flights-expert-guide-2025): 15 min, confirmed instantly, event type id 4015997. Learn when is the cheapest time to book KLM flights and how flexible dates can help you save more. This guide explains trends, fare patterns, and tools to find the best offers for 2025. Visi more: https://www.flydreamz.com/blog/cheapest-day-to-book-klm-flights.aspx Details: https://cal.com/flydreamz/what-is-the-cheapest-day-to-book-klm-flights-expert-guide-2025.md
- [15 Min Meeting](https://cal.com/flydreamz/15min): 15 min, confirmed instantly, event type id 3404063. Details: https://cal.com/flydreamz/15min.md
- [30 Min Meeting](https://cal.com/flydreamz/30min): 30 min, confirmed instantly, event type id 3404065. Details: https://cal.com/flydreamz/30min.md

## Check availability

```http
GET https://api.cal.com/v2/slots?eventTypeId=<event type id>&start=YYYY-MM-DD&end=YYYY-MM-DD&timeZone=<IANA time zone>
cal-api-version: 2024-09-04
```

The response is `{"data":{"YYYY-MM-DD":[{"start":"<ISO 8601 with offset>"}]}}`; no API key is needed.

## Book

Each event type's `.md` document lists its required booking fields and the `POST https://api.cal.com/v2/bookings` request (`cal-api-version: 2026-02-25`).

## More

- API docs: https://cal.com/docs/api-reference/v2/introduction