Kiwi.com Cheapest Dates API Documentation Get one calendar price per departure day in a window, rated cheap, average or expensive, with the rating thresholds. Add nights_min and nights_max for a return calendar. The calendar has no cabin filter and its prices are economy prices for the date and party. They are calendar prices, not the cheapest fare of a flight search, and can differ from search results. Use the calendar to pick a day and the flight search to see the offers.
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Endpoint
Parameters
Start with the required fields, then add optional filters only when your use case needs them.
Runnable path
4 required parameters needed before sending a request.
7 optional filters available.
string
Required
Kiwi.com place id from the locations endpoint (City:berlin_de, Station:airport:BER) or an airport code (BER). Example: City:berlin_de.
example
string
Required
Place id or airport code of the destination. Example: City:london_gb.
example
string
Required
First day of the window, YYYY-MM-DD, today or later.
2026-06-15
string
Required
Last day of the window, YYYY-MM-DD, at most 62 days after the start.
2026-06-15
integer
Optional
Shortest stay in nights, 1 to 60. Send it with nights_max for a return calendar.
10
integer
Optional
Longest stay in nights, 1 to 60, not below nights_min.
10
integer
Optional
Adults, 1 to 9. Defaults to 1. Adults, children and infants together are at most 9.
10
integer
Optional
Children, 0 to 8. Defaults to 0.
10
integer
Optional
Infants, 0 to 8. Each infant needs an adult. Defaults to 0.
10
string
Optional
Price currency, a 3-letter code such as EUR or USD. Defaults to EUR.
USD
string
Optional
Language of names, such as en or de. Defaults to en.
en-US
Response Schema
Example response fields are illustrative; inspect the JSON before integrating.
Example response fields
Scan these fields before integrating.
data
meta
success
{
"data": {
"days": [
{
"date": "2026-11-19",
"price": 69,
"rating": "AVERAGE",
"currency": "EUR"
},
{
"date": "2026-11-20",
"price": 74,
"rating": "AVERAGE",
"currency": "EUR"
},
{
"date": "2026-11-21",
"price": 64,
"rating": "CHEAP",
"currency": "EUR"
}
],
"nights": null,
"origin": {
"id": "City:berlin_de",
"name": "Berlin"
},
"currency": "EUR",
"end_date": "2026-11-21",
"trip_type": "one_way",
"start_date": "2026-11-19",
"thresholds": {
"cheap": 64,
"average": 69,
"expensive": 74
},
"destination": {
"id": "City:london_gb",
"name": "London"
},
"price_basis": "Calendar price for this date and party in economy. It is not the cheapest fare of a flight search."
},
"meta": {
"billable": true,
"endpoint_family": "cheapest_dates"
},
"success": true
}Errors
Handle these documented responses before retrying or showing customer-facing failures.
Validation Error
A parameter is missing or invalid. This response is not billable.
{
"errors": {
"cabin": [
"The calendar has no cabin filter. Its prices are economy prices. Use flights/search for other cabins."
]
},
"message": "The request validation failed"
}Upstream Unavailable
Kiwi.com did not answer in time. Retry the request. This response is not billable.
{
"meta": {
"billable": false,
"retryable": true,
"endpoint_family": "flight_search"
},
"error": {
"code": "UPSTREAM_UNAVAILABLE",
"message": "The Kiwi.com API is temporarily unavailable. Please retry."
},
"success": false
}Unexpected Upstream Answer
Kiwi.com answered in a form this API does not read. This response is not billable.
{
"meta": {
"billable": false,
"retryable": false,
"endpoint_family": "flight_search"
},
"error": {
"code": "PARSER_DRIFT",
"message": "Kiwi.com rejected the request. Check the parameters and try again."
},
"success": false
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