The ability to cancel pooled miles in the MileagePlus program is generally not straightforward. Once you join a pool, there are specific restrictions that apply:

1. Loss of Access: If you leave a mileage pool, you will lose access to the pooled miles. It's important to note that pooled miles cannot be individually canceled or withdrawn from the pool; they belong collectively to the group.

2. Switching Pools: You can only be a part of one mileage pool at a time. If you want to leave your current pool and join a different one, you would typically lose any accumulated contributions to the former pool.

3. No Refunds for Pooled Miles: There is typically no provision for "cancelling" pooled miles akin to canceling a flight or booking. Once the miles are pooled, they are considered part of the collective pool and not individually accountable.

For more detailed information, you might want to check the following resources:

• Forbes on United Airlines’ MileagePlus
• Frequent Miler on Managing Rewards

If you have other questions regarding your pooled miles or consider leaving a pool, it may be beneficial to contact United Airlines' customer service for specific guidance related to your situation.

Sources

Uh-Oh: United Pauses Mileage Pooling Hours After LaunchMost Effective Way to Acquire 500 Miles Quickly? : r/unitedairlinesUnited Airlines MileagePlus: The Ultimate Guide - ForbesConsolidated: XXXX UA miles short of award- how to get them ...Managing rewards in multi-player mode - Frequent MilerSharing miles with friends, family: These airlines allow it7 Loyalty Programs That Let You Pool Your Points and Miles ...

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