Go through your results for flights to Delhi in India with Netflights. The most popular airlines for this route are Emirates, Gulf Air & Flydubai, with Emirates claiming the top spot. Although Etihad Airways usually has the best prices, it's best to double check what's available for your travel dates.
If these flights are too expensive, try searching for a different time of year. So if your dates are flexible, consider looking at different times of year.
Delhi receives 21 direct and indirect flights every week, but the cheapest airline is normally Etihad Airways. So, if the flights to Delhi don't work for you, you could always try searching for flights to other airports in India.
Looking at a few different departure airports will give you even more choice. The most popular airports offering direct flights to Delhi are Dubai (DXB). See what you can find. And remember, it's best to book your flights in advance wherever possible.