Last updated: April 2, 2026
This policy explains what information Butterfly Flights (operated by Ostira, LLC) collects when you use our website at butterfly.flights, why we collect it, and your choices about that collection.
Account information. When you create an account or set up a price alert, we collect the email address you provide. If you sign in with Google, we receive your name and email from Google. If you subscribe to Pro, we collect payment information through Stripe (we do not store your card number directly).
Search queries. When you search for flights, we process your origin, destination, dates, and cabin class to look up prices. We store alert parameters so we can check prices on your behalf.
Cookies and local storage. We use cookies and browser local storage to keep you signed in and remember your preferences. These are functional cookies required for the service to work.
Server logs. Our servers automatically record your IP address, browser type, and pages visited. We use this for security, rate limiting, and to understand aggregate traffic patterns.
Google AdSense. We use Google AdSense to display advertisements. Google and its advertising partners may place cookies on your browser to serve ads based on your prior visits to this site or other websites. These cookies allow Google to show you personalized ads.
How personalized ads work. Google uses cookies (such as the DART cookie) to serve ads based on your browsing history. This means the ads you see may be tailored to topics you have previously shown interest in.
Opting out of personalized ads. You can opt out of personalized advertising by visiting Google Ads Settings. You can also opt out of third-party vendor cookies at the Network Advertising Initiative opt-out page. Note that opting out does not remove ads entirely; you will still see ads, but they will not be personalized.
Third-party vendors. Third-party ad networks that serve ads on our site may also use cookies, web beacons, or similar technologies to collect information about your interactions with their ads and other websites. We do not control these third-party technologies, and their use is governed by those companies' own privacy policies.
We use the information we collect to:
We do not sell your personal information. We share data only with:
We keep your account information and alert data for as long as your account is active. If you delete an alert, the associated price history is removed. Server logs are retained for up to 90 days. If you request account deletion, we will remove your data within 30 days.
Depending on where you live, you may have the right to:
If you are a California resident, you have the right under the CCPA to know what personal information we collect and to request deletion. We do not sell personal information as defined by the CCPA.
If you are in the European Economic Area, you have rights under the GDPR including the above. Our legal basis for processing personal data is your consent (for account creation and alerts), contract performance (for Pro subscriptions), and our legitimate interests (for security and service improvement).
To exercise any of these rights, contact us at [email protected].
Butterfly Flights is not directed at children under 13. We do not knowingly collect personal information from children under 13. If you believe we have inadvertently collected such information, please contact us and we will delete it.
We may update this privacy policy from time to time. If we make significant changes, we will post a notice on our website. Your continued use of Butterfly Flights after changes are posted means you accept the updated policy.
If you have questions about this privacy policy or your data, email us at [email protected].
Ostira, LLC