Is there anyway to find out if a route has a (cheaper) code share partner?

While looking around for flights from Sydney to Sri Lanka (SYD-CMB) I narrowed down the possible connections through south east Asia. The best connection was via Singapore. By pure chance I found it is cheaper to buy a code share Virgin flight than an actual Singapore Airlines ticket. This seems like a useful trick.
Is there any way to find all the code share partners for a particular route?
Best Answer
While I'm not aware of any site that just lists codesharing partners for everyone, most airlines list their codeshare partners on their website.
For the example, you give, Singapore Airlines shows the list of partners on their site. However, this is for all routes and you'd still need to work out which of those are on the route you're after.
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How do you know if a flight is codeshare?
How do you know if a flight is a codeshare? Airlines are legally mandated to clearly state when a flight is operated as a codeshare. You should see this in the booking process, usually under the flight number with the words \u201coperated by,\u201d displaying the operating airline's name.What is code share partners?
Code sharing is a partnership between two airlines that allows an airline to place its two-letter identification code on the flight schedules of another airline. This means that flights can be marketed by one airline and operated by another.Why do airlines do codeshare?
Airlines have codeshare agreements because they want to be able to fly their customers to more destinations without having to buy more planes, hire more flight attendants, and pay more in airport fees. So, airlines partake in partnerships to facilitate this agreement.Do you earn miles on codeshare flights?
You can earn AAdvantage\xae miles when you fly on American and codeshare flights operated by partner airlines. Here's how: Buy an eligible published fare ticket in an eligible booking code. Fly an eligible route.Amazon DSP Drivers Reveal The Challenges Of One-Day Shipping
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Answer 2
Subscription sites such as ExpertFlyer will show you all flights, including codeshares for the same flight, so you could, e.g., search for flights SYD-CMB leaving at a certain time, and see them all. The site will also show you all published fares SYD-CMB so you can see which is cheaper. Free sites such as Google flights and Matrix will show you both flights and prices, so will be more convenient, and more to the point of what you want to know.
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