As we get ready to leave the Midwest, I see that WOW Air will start service between Chicago O'Hare and Iceland in July: Chicago Tribune story. If you find the right dates, it's $99 to Reykjavik and $149 with connections to London, Paris, or Berlin (one-way, with the return being higher generally because of government fees). They are no-frills, and charge for checked or carry-on bags beyond a "personal item." One can consider what the bottom-line fare is, and whether it's worth the trade-off of comfort and convenience versus what the more established airlines offer.