I booked flights online from Denver to Singapore through Omega. They had the cheapest fares with United Airlines and ANA. Once booked (and paid for!) Omega asked me to send a copy of my passport and my credit card, for security reasons they claimed. I reluctantly did, but they then canceled my reservation (but kept my money). I doubt they actually had the flight at the price I paid. I tried for 2 weeks to contact them and they dodged my e-mails and I couldn't reach them by phone. I had to have my credit card company go after them to get my money back.
Stay away from this company. If it seems to good to be true...