IT: Welcome to Derry is available to stream on HBO Max in the United States, with the HBO channel airing it as well. Outside the U.S., availability varies by region, with services like Sky Atlantic/Now TV in the UK and other local platforms in Canada and Europe offering streaming or broadcast access. If you’d like, I can look up the exact streaming options for your country and whether it’s available to rent or purchase there. Direct answer

• United States: HBO Max (streaming) and HBO (linear) release window.
• United Kingdom: Sky Atlantic and Now TV (streaming/broadcast).
• Canada: Crave (streaming) with episode-by-episode availability.
• Other regions: check local streaming services or broadcasters (availability can change).

If you tell me your country or region, I can provide a precise, up-to-date list of where to watch and any current rental/purchase options.