Iceland has a concentrated tourist season, peaking from mid-June through August. Many Icelanders think the summer tourists don't know what they're missing. Iceland offers plenty to do in spring, fall, even winter, and prices are dramatically lower for airfares, car rentals, and accommodations.
If you paper file, it will take three to four weeks for the IRS to process the return and acknowledge your refund. If you e-file, you will get a notice of arrival within 24 hours and confirmation of refund within 72 hours.
Once its accepted most returns are processed in 21 days or less and in many cases within one week. I think a lot of people are misunderstanding your question, and are answering how long it takes to RECEIVE your refund...not how long the IRS takes to approve that you're receiving a refund. 24 hours, though, usually. Any length of time. For simple returns where the taxpayer hasn't moved, hasn't changed jobs, isn't asking for credits and filed after the IRS had their W-2 on file, maybe 8 days. For everyone else, it could be 3 weeks (90%) to 6 months (the other 10%).