Flights from Derry to Sioux Falls lean towards being more expensive in July. Prices are generally better when you fly from Derry to Sioux Falls in September, with the cheapest ticket starting at £538.
At this time, Cheapflights has noticed price decreases for many domestic flights due to COVID-19. Travel is not necessarily recommended at this time, and flights may be prone to cancellation: please check with local authorities in both Derry and Sioux Falls for travel alerts, and be sure to review the airline's cancellation policy and travel advisories before booking. For more information, please view our post on what to know about COVID-19 (coronavirus) and travel.
Derry will have less rainfall in 2 compared to Sioux Falls over the next 0 days.
You can imagine temperatures to be in the 30 °C range in July. The weather in Sioux Falls is generally hotter than Derry's. As flight availability is subject to become more limited as peak season approaches it is ideal to book in a timely manner.