At DuckDuckGo we've got open-source Instant Answers that currently pull in information from over 1100 sources: (https://duck.co/ia)

If you know of a good data source for scheduled flights you can easily contribute an Instant Answer, or leave the source as a suggestion for our community!

Sorry I don't know a source... actually I don't think I've seen this on any other sites. Just one of those small things that keeps me with Google.

Google paid $700m to get that functionality though.

This is a significant subset of what ITA does though - just a list of what flights go on each day of the week and at what time. I expect that can be built for significantly less than 700 million, certainly among the popular airports that most people search for. I suspect they might have had it before the ITA purchase as well but not 100% sure. The Google flights search with pricing and custom dates and routes came after ITA was bought I think.

It's basically QPX. Not just flights and times, but prices as well. It is the most significant part of ITA.

Flights, times, and fares is deceptively hard to get right. There's a reason there are only a few providers.

Edit: Ahh. If you're saying DDG could get by with just flights and times, and no fares, I see what you mean. That seems to be reflected in the pricing for the FlightStats product vs Google's flight/times/fares API pricing, yes. Parity with Google search requires fares though.

Here is a reasonable looking service:

http://www.flightstats.com/go/Mobile/flightStatusByRoute.do?...

It looks like a nice weekend project for someone.

I typed in sfo and jfk, but it looks like the java script submitted longer names, so there might be some non-trivial airport name handling to wire in.

Flightstats is a popular service. Not free though: https://developer.flightstats.com/getting-started/pricing

Similarly, Google sells api access to their flight search api: https://developers.google.com/qpx-express/v1/pricing

I have no idea if DDG could leverage either and not wreck their business model.