Chase United Cards have 3 Limited Time offers:

1. United Explorer - 60,000 Bonus miles after spending $3000 in 3 months, $95 annual fee is waived for the first year.

2. United Quest Card - 80,000 Bonus miles after spending $5000 in 3 months, $250 annual fee.

3. United Club Infinite Card - 100,000 Bonus miles after spending $5000 in 3 months, $525 annual fee.

Remember the higher the annual fee the more the card has to offer, so before you get scared away by that, look into if it makes sense for your upcoming travel plans.

Southwest is offering a nice sign up bonus of 75,000 bonus points on 3 of their personal cards right now after spending $3000 in 3 months:

1. Southwest Rapid Rewards Plus - $99 annual fee.

2. Southwest Rapid Rewards Premier - $99 annual fee.

3. Southwest Rapid Rewards Priority - $149 annual fee.

Both the Ink Business Unlimited Visa and the Ink Business Cash Card have Best Offer Ever deals. Spend $6000 in 3 months and get $900 Bonus Cash back - $0 annual fee on both cards.

For a limited time get 80,000 bonus points after spending $4000 in 3 months. There is a $550 annual fee that's not waived but can be offset by the $300 annual travel credit every anniversary that comes with this Chase Sapphire Reserve Card.

Citi has an awesome sign up offer on it's AAdvantage American Airlines Executive World Elite Mastercard. Earn 85,000 bonus miles after spending $6500 in 3 months. And a limited time Admirals Club membership comes with this card - that's up to $650 value to help off-set the $450 annual fee.