USA immigration JFK or Seattle? [duplicate]

I am an Indian living in Belgium. I am travelling to Seattle via New York JFK airport from Brussels. I am travelling with Delta for both the legs. I have 4 hours(3hr 54min) of stopover time at JFK. My question is can I do my immigration at seattle international airport instead of JFK. I have heard stories of very long queues at JFK for immigration from my colleagues and I am afraid that I will miss my connecting to Seattle if I have to do my immigration at JFK. One more thing, as per my preliminary itinerary my BRU->JFK flight will arrive at terminal 4 and my JFK->SEA flight will depart from terminal 2 of JFK, how can I transfer quickly from terminal 4 to terminal 2. Thanks in advance.

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How long does immigration take at JFK?

Customs does not take a long time at JFK, and if you comply with regulations, you should be done in 10-15 minutes. However, immigration does take an hour at least, so you must factor that in.

What does immigration check at the airport?

The officer at primary inspection will verify your identity and check your name against various computer databases. The officers are on the lookout for people who might be a security risk or who are using a tourist or other nonimmigrant visa to gain entry to the United States for illegal purposes or a permanent stay.

What happens if you are denied entry at an airport?

If you have been refused entry at the airport because you are visiting you may be required to return once the US re-opens its borders to visitors. If you were denied entry due to another reason not Coronavirus related, continue reading through this article!

What can I expect at US airport?

You will pass through a US immigration checkpoint shortly after you exit the plane. Make sure you have all your required papers in order and ready to show to the CBP agent in the airport when the time comes. Remember to pack the documents you need to enter the US in your carry-on luggage for easy access.

US Customs Refusal. “Everything you need is on my passport” (part 1) tyrant gets mad

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