Your flight from Exeter to Tehran should take about 18 hrs 15 mins. We've gone through all five of the weekly flights to or via Tehran, operated by two airlines, to help you compare flight times and prices.
Or, if you're fairly flexible on dates, try to get a last minute-deal by regularly checking the Netflights website.
If you're not sure who to fly with from Exeter, you might like to know that Emirates is the most popular airline for this route.
Today alone, Netflights has scanned five flights worldwide. But if you can't find one which is right for you, try looking at flights to other cities in Iran to check out some other options.